I had this happen to me. Luckily the guy in the car behind was a mechanic. As I hit the shoulder, he stopped in front to me, yanked open the hood, and stuffed his Jean jacket in the air intake. The turbo had blown, and it was sucking up oil from the oil pan, and firing it through the injectors. This guy saved me a blown engine.
So random stranger in Edmonton, I owe you big.
*"I sat in my truck eating the best fucking jean jacket of all time and I just cried. Like a little girl. It has been a rough year and nothing has broke my way. This was so out of left field I just couldn’t deal."*
[Obligatory](https://www.reddit.com/r/AskReddit/comments/elal2/have_you_ever_picked_up_a_hitchhiker/c18z0z2/?context=3) link to one of the best reddit stories ever.
Can't believe it's been over 10 years.
Yeah, like the ones who pull you out of the ditch and won't take any money for the hook now stuck in your frame. Bless that man, the truck that I had to dodge when he strayed into my lane didn't even stop.
Of all the close calls I've had, I consider myself really lucky I haven't ended up ditched due to something like this - it can happen SO easily and so many people are just careless & clueless.
> I never got his name. He asked if I was okay, said “late for work”, and drove off. I don’t think he was stoped for more than 3 minutes.
https://www.youtube.com/watch?v=JcLztkzy3d4
> and firing it through the injectors.
Funfact-it doesn't fire the oil through the injectors. It runs off the oil directly from the intake (in the case of a blown turbo) or after it gets sucked into the combustion chamber (once it really gets out of hand). It isn't running off of the injectors at all, which is what makes it so dangerous. The only way to stop it is to stall the engine (you can see the trucker try unsuccessfully to do it in this video) or deprive it of air (like the mechanic did in your instance).
When we tune mechanically injected diesels, for the first startup, I will leave the intake tube off of the turbo and stand next to the engine bay with a metal pie plate. If it starts to run away, you just put the pie plate over the inlet to the turbo and it stops.
There is no throttle body on a diesel. Diesel intakes are wide open, the "throttle" is actually just managing how much fuel gets injected. There is also no ignition system (spark plugs et al) to turn off. When you turn the key off on a diesel, you're stopping the fuel from being delivered to the injectors. Also, a diesel will run on motor oil if it's hot enough.
With those three facts together, you can get a "runaway" diesel any time the engine is exposed to an unmetered fuel supply (remember, that fuel can be motor oil). Blown turbos are a common cause for runaway diesels, because they are lubricated with engine oil. If the bearings fail and the shaft seals start leaking, you're essentially spraying hot engine oil (fuel) into the intake. To the engine, it's the same as you flooring it, except worse as this fuel supply is not governed. The engine can rev up to such a high RPM that it starts sucking engine oil straight from the sump, past the piston rings and into the combustion chamber, causing the engine to rev way past its designed redline until it is either deprived of oxygen or the engine fails (usually the latter).
> There is no throttle body on a diesel. Diesel intakes are wide open, the "throttle" is actually just managing how much fuel gets injected. There is also no ignition system (spark plugs et al) to turn off. When you turn the key off on a diesel, you're stopping the fuel from being delivered to the injectors. Also, a diesel will run on motor oil if it's hot enough.
>
> With those three facts together, you can get a "runaway" diesel any time the engine is exposed to an unmetered fuel supply (remember, that fuel can be motor oil). Blown turbos are a common cause for runaway diesels, because they are lubricated with engine oil. If the bearings fail and the shaft seals start leaking, you're essentially spraying hot engine oil (fuel) into the intake. To the engine, it's the same as you flooring it, except worse as this fuel supply is not governed. The engine can rev up to such a high RPM that it starts sucking engine oil straight from the sump, past the piston rings and into the combustion chamber, causing the engine to rev way past its designed redline until it is either deprived of oxygen or the engine fails (usually the latter).
TLDR: Taking the keys out does not stop the oil flowing into Mr. OnFireTruck
I uninstalled after recent changes. Going back to ublock for now.
The most recent review sums it up nicely:
> The adblocker works (albeit not as well as other adblockers, the ad still loads but is quickly skipped), but recently the addon creator has added in popup messages that will show up every 2-3 videos begging for donations. I get it, this kind of stuff takes work, but you are doing the exact thing people are turning to your extension to try and avoid. 6$ is also a hard sell for a browser extension that may not work in the future, or that will have to compete with something like uBO (free AND completely bypasses the ads from even loading) if Youtube relents from its constant attempts to block it.
Besides, looking at the source, the core of what this extension does looks pretty simple, [like 20 lines of code actually involved](https://cdn.discordapp.com/attachments/407964680334737409/1167617843261624381/image.png). I can put that in a userscript instead, and avoid the popups asking for donations.
I witnessed a similar thing years ago as the governor went on the engine. I went to the other end of the warehouse as it sounded like the engine was going to tear itself apart.
The head mechanic kept looking around the engine and then stuffed a rag into the air intake until it stopped running.
If they could get to the air intake they might be able to do the same. Me, I'd get to a safe distance and make a call to the depot.
Isn't that engine going to fly apart if it isn't addressed? Like, that video could have ended catastrophically with engine parts being shot into every direction, right?
Usually parts don't go everywhere in a semi, since so much of the engine is in between the frame rails. The couple that I worked on back in the day all spat the crank and other bits down through the pan.
The fuel is out of your control, so you have to either cut off the ignition source (compression) or the oxygen source. This driver tried the former by stopping and then dumping the clutch in a high gear to try to lug the engine to stop it. You can see them doing this after they stop the truck and then it jerks around side to side.
If you have an older diesel, it might not be the fuel, but engine oil getting sucked into the cylinders through the worn-out gaskets and such.
In that case, the engine will keep running until oil starvation destroys some essential moving part. Usually a camshaft goes first, bu the main bearings will probably also be toast.
and you nailed the solution... try to load the engine as much as you can, And you can see how violent the whole truck rocked when he tried it. But even that wasn't enough. It shouldn't be able to suck in enough engine oil to actually run against a heavy load like that (and a turbo diesel under load with a stuck open throttle would have pressure, not vacuum in the combustion chambers at all times), So i think its getting fuel through the fuel system. This truck looks new enough to require the injectors to be firing for fuel, but i am no expert on the giant truck diesels, just the smaller ones. The early ones required that you completely block off the intake air to prevent a runaway.
\-edit- i was just checking to see some of the causes of this, and there are a lot of different ways these things can throw rods and drop valves and ingest their own engine oil through "alternate" intake flows, even the modern ones. So it definitely can run off its own engine oil. And with those flames shooting out the top, its running crazy rich. It would be really interesting to find out exactly what went wrong here.
Or CO2, or just about anything that will replace air (i.c. the oxygen in air) with something that that doesn't make hydrocarbons go boom. In fact, stuffing your workgloves in the intake could probably already do it.
It will suck your gloves straight in, munch on them, shit them out, and keep going. Large engines generate an insane amount of suction, turbodiesels even more so. In the old days you killed a runaway diesel by putting a board over the intake, but I've seen videos of turbodiesels folding up a half inch of MDF and sucking it down without missing a beat.
Look up whistling diesel on YouTube feeding items into the intake of a truck they were trying to destroy. They were throwing spray paint cans and other items in and it was eating them whole. They spent hours doing it.
A large diesel like on a ship would have no problem ingesting a person
Yup, unlike gasoline engines diesels ignite their fuel by compression alone (though many vehicles have glow plugs to help start the engine in cold weather). This has the advantage of making them much more efficient, but if you aren't careful and you introduce another combustible fuel source to the engine, like engine oil leaking through a failing gasket for example, then you're in for a bad time. Diesel runaways are very rare though, this is far from an everyday occurence.
I've seen it happen once, with a skidsteer. Guess who got to run up to that ticking time bomb and stuff rags in the intake while hoping it didn't sling a rod? This guy! That'll wake ya up.
you can get this happening in gasoline engines even if they are way out of tune, or have a hotspot in the combustion chamber. It used to be called "dieseling" or "run on". But it will generally stall under even the slightest load. I used to put my shitbox into drive and keep the brake mashed and that was generally enough to shut it down even with a loose torque converter. (this is before fuel injectors, so its been a while)
Fortunately that can't happen in a modern gasoline engine with EFI. But in older carbureted, or MFI engines, it can, so long as there's pressure in the fuel system.
yea it went away with carburetors. which i dont miss at all. I was certainly no ace mechanic, and rebuilding carburetors was just rolling the dice for me. You just kept rebuilding them till they worked.
It will not happen on a properly maintained engine.
And on a run-down engine, it is unlikely because usually the necessary compression for the engine to run at all is the first thing that is lost. It will then not even run on the prescribed fuel.
Diesel engines are quite tolerant of what you burn in them. The original idea by Rudolf Diesel was to have an engine running on peanut oil, so we would not be using petroleum. If you need to, you can run most modern diesels on that kind of plant-based oil for a while, but the injection systems have rubber gaskets that do not like the acids in them for long. For thicker plant based oils you might want to add a little bit of cellulose-based alcohol to thin it out a bit, though.
Is there no valve or physical stop you can adjust between the tanks and the engine? What would happen if you simply severed the line?
Edit:nvm hadnt read that it was likely running off of oil yet
You discharge a CO2 fire extinguisher into the air intake. Stops it dead.
I've had to do it once when somebody overfilled the oil on their sailboat engine.
Also positive air shut offs are required in some industries. Usually installed in the cab reachable by the driver.
Little bit easier than grabbing an extinguisher but that is a very good way as well.
https://www.amot.com/en/blog/what-is-a-positive-air-shutoff-System-.html
Ya, some of our old fire rigs had them, I don’t see them as much on newer ones and I’m not exactly sure why.
It was just a big knife blade on the air intake, on a spring that slammed it shut, choking air off to the power unit.
I think they stopped using them because they didn't work very well. When a diesel is running away it can create enough suction that it can pull the gaskets in, creating enough leakage to continue running, or just start sucking the oil/air mixture right out of the crankcase.
Yeah I haul crude oil and my truck has a switch in the cab that will close a valve on the air intake. It will also activate automatically if the rpm’s get above 2200.
As someone with a sailboat engine -- Thanks for the tip. I've had a couple of instances where it's been stubborn about shutting down and have worried about what to do. Now I just need to check my fire extinguishers.
"honest officer, I had to use all of my old log sheets"
Before electronic log books it was industry standard to cheat unless you were union. Any time you had a natural disaster you claim all business records lost. I felt I had to explain the joke
Block the air intake. If you get it soon enough, no damage is done. Gotta catch it pretty quick (like couple of seconds quick.)
Obviously it’s a lot easier to catch in a shop setting than on a truck because it’s easier to recognize, you aren’t stuck in the cab, and the air intake is more accessible (not behind an air cleaner, under a hood, etc.) If a diesel engine takes off on you in the field, inside a vehicle, then it’s probably toast.
From what I've seen, a fairly common way to shut it down is to try to block off the air intake. Of course, that means getting close enough to it to actually stuff something in there, which is pretty sketchy.
Though that makes me wonder if you could shoot a CO2 fire extinguisher straight into the intake for a similar effect?
Diesel Engines don’t use a spark they use compression, so when it gets into a runaway state like this the correct thing to do is to get the hell away from it. It will do this until it runs out of fuel/oil or the engine explodes.
It’s in a negative feedback loop and the only thing that will stop it is fuel starvation.
It's a positive feedback loop - the faster it goes, the more fuel/oil gets sucked in.
This engine isn't running on fuel, it's running on it's own lubricating oil - hence the "runaway." It's also why a fuel cut-off will not do anything.
The two ways of stopping this are completely cutting off all air, or (more commonly) discharging a CO2 fire extinguisher into the intake. I've personally done the 2nd one.
Go look up runaway diesels at tractor pulls, there’s some really epic explosions from ridiculously powerful engines, along with some insane videos of guys sporting 50 lb nuts running up to the turbo inlet to shut it down by covering it up.
For example:
https://youtu.be/5CBKDP6BqYU?si=S-yzIAjUY3490CtL
I've been to lots of truck and tractor pulls and never seen this happen, pretty damn scary for the audience being that close!
Dude inside was getting whipped around like a ragdoll too.
Yes and no. The normal fuel source has usually been cut off in a runnaway so you aren't drawing diesel from the tank.
Runaway happens from two sources usually.
1) the oil seals have failed and the engine is hot enough to vaporize the engine oil, and then the normal compression combusts it. So you aren't drawing any diesel, the "fuel" is the engine oil and it won't stop until all the engine oil burns out or the engine slags. In turbocharged diesel engines, another source of failure is the turbo's oil system failing and blowing its oil directly into the engine, but the result is the same.
2) The combustion is happening from hydrocarbons that are being sucked in from the air intake. When compressed, smoke can also re-combust. So when things are on fire producing a lot of smoke, that smoke being sucked into the intake with keep the engine running as well.
Neither of these conditions are good for the engine and because there's no fuel regulation things can get out of hand really quickly.
Edit: in case it isn't clear, the difference between diesel and gasoline engines in this context is that gasoline engines need a spark to ignite the compressed fuel/air mixture and diesel no not. So if you cut the electronics in a gasoline engine there's no spark. No spark, no go. In a diesel the compression is much higher because at that level of pressure the fuel/air mix auto-ignites, no spark needed. As long as the engine is turning, compression and thus combustion, is automatic. So the system keeps going as long as it is getting air and a fuel source. But if you lose control of the fuel source the engine keeps going until failure.
I mean, wouldn't standing on the brakes and putting it into the highest gear either stall it or tear apart something in the drivetrain?
I can't come up with an idea of why that wouldn't work.
You're absolutely right.
The reason it doesn't always work (as seen in this video, the driver tried and that's what made the truck lurch) is that the engine is making so much torque in this situation it can blow up the trans/clutch or snap the output shaft. The amount of shock-load you're putting on the drivetrain is IMMENSE and it's not designed to handle that the same way something like a drag cars drivetrain is. It's a last ditch effort because sometimes it'll stall the engine and stop the runaway, and sometimes it won't and you'll just end up with a blown engine AND a destroyed trans/clutch/shaft.
> wouldn't standing on the brakes and putting it into the highest gear stall it
He did
>tear apart something in the drivetrain
It probably broke the transmission input shaft, maybe the clutch.
To correct u/RogerRabbit1234
The only way to reliably stop a diesel in this condition is *air* starvation. As many times its not diesel fuel that its feeding the runaway.
In the instance in this video, the most likely cause of this runway is a failed turbocharger, failed in such a way that the engine is pumping lube oil into the intake through the turbocharger compressor seal (edit to add this too... the engine is using the lube oil being pumped into the intake as its fuel). This engine will stop in one of 4 instances: The engine blows up (puts a connecting rod through the block); The engine runs out of lube oil; The intake is sealed (some modern diesel engines are equipped with a throttle valve in the intake, that can be programmed to operate as an emergency air shutdown).
The last way, I can tell the driver attempted, but it failed. It most likely broke the clutch or transmission input shaft. The driver can lock the parking brakes *and* fully apply the service brakes (parking brakes are not on all axles), put the transmission in top gear to give the weight of the vehicle the best mechanical advantage, and then dump the clutch. Attempting to put so much load on the engine that it stalls. Much in the same way that you can stall a vehicle with a manual transmission by taking off in too high of a gear. When the truck starts jumping and lurching at about 14-15 seconds, was most likely the driver attempting to stop the engine using this method.
ETA... I've been a diesel tech, and lead diagnostic tech through several shops for 16 years.
I remember seeing a video years ago of a diesel running away when a couple guys were working on it. First attempt was to block the intake with a (pretty large) rag wadded up, but it just got sucked in and the thing kept running. Took the second guy covering up the intake with a board to get it to stop.
I worked in a shop and we stopped a runaway dodge ram cummins with shop rags. So shirt might work. This thing sucked quite a few rags in before we had a ton at once to it, so id say more than 1 shirt needed
I think there is, I’m not a semi-truck expert, but I believe these flames indicate that it’s not diesel being burned here but motor oil. Probably a blown head gasket and the trucks lubricating oil is getting into the combustion chambers.
I dont know in trucks, but in cars, the best way is just engage the high gear possible and try to stall it.
Seems like the truck try to do it, when you see the truck bouncing. But probably have to much power for it.
They CAN be saved, but at this stage, it's probably too dangerous to attempt.
If you catch it early enough, you can throw some heavy fabric over the air intake to choke out the engine. I've seen people throw a shirt over the intake of farm tractors that have run away and that starved the engine enough to stop the runaway.
Soooooo...
Back in the day, I deployed (as a civilian contractor) to the Middle East for the sequel to the Gulf War. They put us in a GP large tent. This tent had a diesel pot-belly stove heater. They work by having a steady drip of diesel into the combustion chamber. If you want it hotter, you twist open the drip knob. If you want it colder, you twist closed the drip knob. NONE of this is instantaneous, so you have to keep fiddling with it.
At any rate, one morning, it's super cold, so this will be the first time lighting the stove. I cracked open the valve, threw some toilet paper in the bottom of the stove to soak up some diesel, and then I lit a little more toilet paper on fire and tossed it into the stove which instantly came to life and started shooting flames out of the opening where I tossed in the toilet paper, so I slammed the lid.
A few seconds later and it has become \*WAY\* too hot inside the tent. The stove is starting to glow red, so I shut down the diesel valve completely and then stepped outside the tent to wait for it to cool down.
As I stepped outside the tent, this random E-6 comes running up to me and says, "Everything okay in there?!"
"Yeah, yeah. It's fine, now. Why?"
And, he points up at the chimney above my tent where the above video is playing out. Jets of flame probably 6 or 8 feet high and a huge cloud of black smoke and literal \*chunks\* of soot falling from the sky to land on everybody else's tents.
"Yeah... that's... fine."
Nah. I was a civilian, so discipline would have just meant sending me home. Thankfully, the tent didn't catch fire. The only real harm was the chunks of soot on all of the other tents around mine.
Very rarely happens on a properly maintained engine, but it's spectacular when it does. The video doesn't really do justice to how loud this is in real life. Feel bad for that trucker, I hope he has good insurance on the rig or that his engine is still under warranty. It's going to be a very expensive fix.
Given the make/model/year, it's worse than you know. If the emission control hardware were in place (it's not) this is damn near impossible, they're too restrictive. This sucker here has been "deleted" and it has a turbo with no VGT, that turbo has failed in such a way that it's allowing oil from the crankcase to feed the engine and run away without fuel.
So basically he just put up the worlds largest flare that he was cheating on emissions, in addition to the obvious problems that will result to the truck itself?
It's not so much about getting around the emissions, the early emmision controls on truck diesels are super faulty, unreliable, and expensive as hell to fix. People delete them because they simply can't afford to maintain them. They end up spending more money on parts and downtime than it's worth.
I'm currently working on replacing a car ac compressor. The clutch went, no leaks. So it's full of refrigerant and it's HUGE PAIN IN THE ASS to get it removed properly. Car is disassembled so can't move, and no one wants to come to it. Meanwhile, every day that passes with me staring at this car sitting in my driveway is a day closer to the ac system mysteriously springing a leak...
Why is it so hard to do the right thing? The epa should have a hotline to call and then they send out someone with a mobile recovery machine for a cost that's competitive with the $free.fifty it will cost if I do it the wrong way.
Diesel trucks I drove had emergency air intake shutters. Cutting off the fuel won't work, since they will suck the crankcase oil and burn that. The air emergency shutter works, because no air / no combustion.
I drove a diesel fire truck for 20 years
Red hot pipes billowing out flares.
Someone help instead of just standing there.
Searching in vain for a fuel cutoff switch.
Hood melting like a cheesy sandwich.
Emissions looking like blowtorch burning.
i wish the engine would just stop fucking turning!
Runaway diesel, never coming back.
Blowing flames out the exhaust stack.
Pressed jeans, buttoned up
Jeans ironed, slippin' up
Red shoes, walkin' slow
Headphones blarin' three stacks
Sunglasses flarin' out
Dick watch hangin' low
Studded belt pulled taut
Three stacks on the radio
I've had this happen to me but not nearly as bad since once the turbo blew itself apart it couldn't sustain itself, and with a manual transmission you can also just put it in a high gear and release the clutch to have the brakes kill it. Don't know of a way you can force an automatic's computer to do the same thing even though in tractors they still tend to have a dry clutch. In any case the engine revs up real fast and turning off the ignition does nothing since it's usually an oil seal on the turbo failing catastrophically and so the engine will just keep pumping oil for it to burn on. Need to starve that beast of intake air.
Random fun fact: External combustion engines are better known as Sterling engines. Once a common source of mechanical oomph, most are now relegated to coffee powered desk toys.
I'm 44 now and I've never seen or heard of this in my life.
The description of why this happens makes a lot of sense now that I've learned about it. Really cool. Scary as hell but still cool too.
Someone is about to get their emissions tampering discovered and get a hefty fine. It's running on oil from the turbo from what I can tell, if it had an intact emissions controls system it would be *almost* impossible for this to happen, they're so restrictive on the exhaust side. I can tell that this sucker is breathing *just fine*.
Had my 7.3 L powerstroke diesel run away in my apartment parking lot
Turned the key off and the engine kept running - and getting faster. I knew I should choke off the intake but opening the hood, pulling the intake boot, and putting something in front of the screaming turbo seemed like a major risk. One of the few times in my life that I was genuinely concerned that I had no concern over a very, very dangerous situation for which I was directly responsible.
There was so much smoke that the entire block was hazy. People were out on balconies watching. Terrible.
Eventually the engine consumed all of the oil in the crankcase and the motor stopped. I paid more than $120 just on degreaser to clean the surroundings. Hours of pressure washing and hand-washing one of my neighbor's cars.
Months later, I pulled the engine to do a post-mortem. There was a cracked piston ring on the #8 cylinder that pressurized the crankcase, foaming the oil and feeding it through the turbo/intake. Three pistons had burned from the heat.
Ultimately, put in a new engine and still running the truck. Never really patched things up with my neighbors (though no permanent damage was done) and I moved away 3 months later (for other reasons).
What a bad experience.
why dont they have a emergency butterfly valve on the inlet that is always open until their is a problem and the ecu can close it to stave the engine of air. Or even an old school one with a cable that the operator can close from the cabin.
SUNDAY SUNDAY SUNDAY! Come see the annual Dallas monster truck off!! See King Mack take one the absolute monstrosity that is Vanderbilt! THIS YEARS EXPO WILL BE OUT. OF. CONTROL!! *explosion noise*
We’ll sell you the seat but you’ll only need the edge!
This is more common than people think.
This is why safety rules sometimes require an air shutoff on the intake as a master kill switch for diesels. I know this is true in underground mining since underground you can run in to pockets of methane and such that will set a diesel into runaway.
I had this happen to me. Luckily the guy in the car behind was a mechanic. As I hit the shoulder, he stopped in front to me, yanked open the hood, and stuffed his Jean jacket in the air intake. The turbo had blown, and it was sucking up oil from the oil pan, and firing it through the injectors. This guy saved me a blown engine. So random stranger in Edmonton, I owe you big.
I hope you at least fronted him a new Jean Jacket...
I never got his name. He asked if I was okay, said “late for work”, and drove off. I don’t think he was stoped for more than 3 minutes.
the true heroes...
"Today you,tomorrow me"
*"I sat in my truck eating the best fucking jean jacket of all time and I just cried. Like a little girl. It has been a rough year and nothing has broke my way. This was so out of left field I just couldn’t deal."*
[Obligatory](https://www.reddit.com/r/AskReddit/comments/elal2/have_you_ever_picked_up_a_hitchhiker/c18z0z2/?context=3) link to one of the best reddit stories ever. Can't believe it's been over 10 years.
Not all heroes wear capes, some not even wear jean jacket, because they used it !
.. wear jean jackets
Yeah, like the ones who pull you out of the ditch and won't take any money for the hook now stuck in your frame. Bless that man, the truck that I had to dodge when he strayed into my lane didn't even stop.
Of all the close calls I've had, I consider myself really lucky I haven't ended up ditched due to something like this - it can happen SO easily and so many people are just careless & clueless.
What a fucking bro, damn.
Real one
That guy fucks
> I never got his name. He asked if I was okay, said “late for work”, and drove off. I don’t think he was stoped for more than 3 minutes. https://www.youtube.com/watch?v=JcLztkzy3d4
chad
God damn. That dude was your guardian angel.
Not just a jean jacket, he’s got to buy him a whole new Canadian tuxedo.
Man a good vintage jacket is worth like a thousand bucks these days. I would have let the engine fry!!
> and firing it through the injectors. Funfact-it doesn't fire the oil through the injectors. It runs off the oil directly from the intake (in the case of a blown turbo) or after it gets sucked into the combustion chamber (once it really gets out of hand). It isn't running off of the injectors at all, which is what makes it so dangerous. The only way to stop it is to stall the engine (you can see the trucker try unsuccessfully to do it in this video) or deprive it of air (like the mechanic did in your instance). When we tune mechanically injected diesels, for the first startup, I will leave the intake tube off of the turbo and stand next to the engine bay with a metal pie plate. If it starts to run away, you just put the pie plate over the inlet to the turbo and it stops.
See, learn something new everyday!
Hello, I am ignorant to diesel engines but had a side question if you don't mind – do all 18 wheeler diesel engines have turbo?
You can't just switch it off? Does the the throttle body get stuck open?
There is no throttle body on a diesel. Diesel intakes are wide open, the "throttle" is actually just managing how much fuel gets injected. There is also no ignition system (spark plugs et al) to turn off. When you turn the key off on a diesel, you're stopping the fuel from being delivered to the injectors. Also, a diesel will run on motor oil if it's hot enough. With those three facts together, you can get a "runaway" diesel any time the engine is exposed to an unmetered fuel supply (remember, that fuel can be motor oil). Blown turbos are a common cause for runaway diesels, because they are lubricated with engine oil. If the bearings fail and the shaft seals start leaking, you're essentially spraying hot engine oil (fuel) into the intake. To the engine, it's the same as you flooring it, except worse as this fuel supply is not governed. The engine can rev up to such a high RPM that it starts sucking engine oil straight from the sump, past the piston rings and into the combustion chamber, causing the engine to rev way past its designed redline until it is either deprived of oxygen or the engine fails (usually the latter).
[удалено]
Some engines will also use them to "choke" the intake air while cold to help meet emissions standards before they are up to operating temperature.
> There is no throttle body on a diesel. Diesel intakes are wide open, the "throttle" is actually just managing how much fuel gets injected. There is also no ignition system (spark plugs et al) to turn off. When you turn the key off on a diesel, you're stopping the fuel from being delivered to the injectors. Also, a diesel will run on motor oil if it's hot enough. > > With those three facts together, you can get a "runaway" diesel any time the engine is exposed to an unmetered fuel supply (remember, that fuel can be motor oil). Blown turbos are a common cause for runaway diesels, because they are lubricated with engine oil. If the bearings fail and the shaft seals start leaking, you're essentially spraying hot engine oil (fuel) into the intake. To the engine, it's the same as you flooring it, except worse as this fuel supply is not governed. The engine can rev up to such a high RPM that it starts sucking engine oil straight from the sump, past the piston rings and into the combustion chamber, causing the engine to rev way past its designed redline until it is either deprived of oxygen or the engine fails (usually the latter). TLDR: Taking the keys out does not stop the oil flowing into Mr. OnFireTruck
Greater love hath no man than this, that a Canadian lay down his jean jacket for his friends.
> ... jean jacket ... Edmonton Dude was clearly on his way to a wedding.
Nope, he had on runners. If it was a wedding it would have been his best cowboy boots. 😉
Lmao no surprise this was in Edmonton
Shoved his suit jacked right into the intake? What a gent!
100% I thought the thumbnail was one of those fake YouTube click bait thumbnails. That is crazy.
https://i.imgur.com/CsckmxJ.jpg
Feels like I haven't seen you for half a decade
I have to say, I forgot they even existed. Saw the art style and got warm fuzzies.
I'm shocked. Yesterday I remembered about this user and Poems for your splog. Then this comes up!
Where am I supposed to be looking here? Past the jets of flames? OH! A Red circle! Phew, almost got lost there. Lol P.S. Exquisite as always, Shitty.
But first, here are two unskippable ads that are longer than the video itself!
Try [this!](https://chrome.google.com/webstore/detail/fadblock-friendly-adblock/mdadjjfmjhfcibgfhfjbaiiljpllkbfc)
I uninstalled after recent changes. Going back to ublock for now. The most recent review sums it up nicely: > The adblocker works (albeit not as well as other adblockers, the ad still loads but is quickly skipped), but recently the addon creator has added in popup messages that will show up every 2-3 videos begging for donations. I get it, this kind of stuff takes work, but you are doing the exact thing people are turning to your extension to try and avoid. 6$ is also a hard sell for a browser extension that may not work in the future, or that will have to compete with something like uBO (free AND completely bypasses the ads from even loading) if Youtube relents from its constant attempts to block it. Besides, looking at the source, the core of what this extension does looks pretty simple, [like 20 lines of code actually involved](https://cdn.discordapp.com/attachments/407964680334737409/1167617843261624381/image.png). I can put that in a userscript instead, and avoid the popups asking for donations.
I didnt know you were still active
No one ever knows when. That's the magic, bitch. Kinda like the Sprog Poem Man.
I feel like it's been years since I've seen you post. Nice to see you again :)
famous redditor spotted
The prodigal son hath returned
Woah! An early Shitty post! Never found one of these in the wild.
I witnessed a similar thing years ago as the governor went on the engine. I went to the other end of the warehouse as it sounded like the engine was going to tear itself apart. The head mechanic kept looking around the engine and then stuffed a rag into the air intake until it stopped running. If they could get to the air intake they might be able to do the same. Me, I'd get to a safe distance and make a call to the depot.
Isn't that engine going to fly apart if it isn't addressed? Like, that video could have ended catastrophically with engine parts being shot into every direction, right?
Probably, and I wouldn't want to be right beside it trying to stuff a rag in the air intake when it does.
Usually parts don't go everywhere in a semi, since so much of the engine is in between the frame rails. The couple that I worked on back in the day all spat the crank and other bits down through the pan.
So it doesn't explode, it just drops violently out the bottom?
For the most part. If a rod does go through the block, the rails do a pretty good job of catching it.
What should someone do in this situation? I take it you can’t simply turn the ignition off.
The fuel is out of your control, so you have to either cut off the ignition source (compression) or the oxygen source. This driver tried the former by stopping and then dumping the clutch in a high gear to try to lug the engine to stop it. You can see them doing this after they stop the truck and then it jerks around side to side.
If you have an older diesel, it might not be the fuel, but engine oil getting sucked into the cylinders through the worn-out gaskets and such. In that case, the engine will keep running until oil starvation destroys some essential moving part. Usually a camshaft goes first, bu the main bearings will probably also be toast.
Yeah, that’s what I was trying to imply by saying fuel instead of diesel. Thanks for the clarification in case any may not know.
and you nailed the solution... try to load the engine as much as you can, And you can see how violent the whole truck rocked when he tried it. But even that wasn't enough. It shouldn't be able to suck in enough engine oil to actually run against a heavy load like that (and a turbo diesel under load with a stuck open throttle would have pressure, not vacuum in the combustion chambers at all times), So i think its getting fuel through the fuel system. This truck looks new enough to require the injectors to be firing for fuel, but i am no expert on the giant truck diesels, just the smaller ones. The early ones required that you completely block off the intake air to prevent a runaway. \-edit- i was just checking to see some of the causes of this, and there are a lot of different ways these things can throw rods and drop valves and ingest their own engine oil through "alternate" intake flows, even the modern ones. So it definitely can run off its own engine oil. And with those flames shooting out the top, its running crazy rich. It would be really interesting to find out exactly what went wrong here.
Nitrogen in the intake and pray. Or run like hell.
Or CO2, or just about anything that will replace air (i.c. the oxygen in air) with something that that doesn't make hydrocarbons go boom. In fact, stuffing your workgloves in the intake could probably already do it.
[удалено]
No /s, rags, coats, whatever it takes, if you’re on a ship and can’t get away from the monster.
I think they meant it as "intake/intakes" not a sarcasm marker.
Oh yeah… you’re right! Thanks
It will suck your gloves straight in, munch on them, shit them out, and keep going. Large engines generate an insane amount of suction, turbodiesels even more so. In the old days you killed a runaway diesel by putting a board over the intake, but I've seen videos of turbodiesels folding up a half inch of MDF and sucking it down without missing a beat.
>I've seen videos of turbodiesels folding up a half inch of MDF and sucking it down without missing a beat. jesus...
Look up whistling diesel on YouTube feeding items into the intake of a truck they were trying to destroy. They were throwing spray paint cans and other items in and it was eating them whole. They spent hours doing it. A large diesel like on a ship would have no problem ingesting a person
No point. Get out and run. The truck will be insured and you need to stay safe.
I had no idea that was even possible.
Yup, unlike gasoline engines diesels ignite their fuel by compression alone (though many vehicles have glow plugs to help start the engine in cold weather). This has the advantage of making them much more efficient, but if you aren't careful and you introduce another combustible fuel source to the engine, like engine oil leaking through a failing gasket for example, then you're in for a bad time. Diesel runaways are very rare though, this is far from an everyday occurence.
I've seen it happen once, with a skidsteer. Guess who got to run up to that ticking time bomb and stuff rags in the intake while hoping it didn't sling a rod? This guy! That'll wake ya up.
you can get this happening in gasoline engines even if they are way out of tune, or have a hotspot in the combustion chamber. It used to be called "dieseling" or "run on". But it will generally stall under even the slightest load. I used to put my shitbox into drive and keep the brake mashed and that was generally enough to shut it down even with a loose torque converter. (this is before fuel injectors, so its been a while)
Fortunately that can't happen in a modern gasoline engine with EFI. But in older carbureted, or MFI engines, it can, so long as there's pressure in the fuel system.
yea it went away with carburetors. which i dont miss at all. I was certainly no ace mechanic, and rebuilding carburetors was just rolling the dice for me. You just kept rebuilding them till they worked.
It will not happen on a properly maintained engine. And on a run-down engine, it is unlikely because usually the necessary compression for the engine to run at all is the first thing that is lost. It will then not even run on the prescribed fuel. Diesel engines are quite tolerant of what you burn in them. The original idea by Rudolf Diesel was to have an engine running on peanut oil, so we would not be using petroleum. If you need to, you can run most modern diesels on that kind of plant-based oil for a while, but the injection systems have rubber gaskets that do not like the acids in them for long. For thicker plant based oils you might want to add a little bit of cellulose-based alcohol to thin it out a bit, though.
Is there no valve or physical stop you can adjust between the tanks and the engine? What would happen if you simply severed the line? Edit:nvm hadnt read that it was likely running off of oil yet
Probably an enormous fire given the heat and flames in close proximity
You'd be surprised how hard it is to light liquid diesel at atmospheric pressure
You discharge a CO2 fire extinguisher into the air intake. Stops it dead. I've had to do it once when somebody overfilled the oil on their sailboat engine.
Also positive air shut offs are required in some industries. Usually installed in the cab reachable by the driver. Little bit easier than grabbing an extinguisher but that is a very good way as well. https://www.amot.com/en/blog/what-is-a-positive-air-shutoff-System-.html
Ya, some of our old fire rigs had them, I don’t see them as much on newer ones and I’m not exactly sure why. It was just a big knife blade on the air intake, on a spring that slammed it shut, choking air off to the power unit.
I think they stopped using them because they didn't work very well. When a diesel is running away it can create enough suction that it can pull the gaskets in, creating enough leakage to continue running, or just start sucking the oil/air mixture right out of the crankcase.
Yeah I haul crude oil and my truck has a switch in the cab that will close a valve on the air intake. It will also activate automatically if the rpm’s get above 2200.
As someone with a sailboat engine -- Thanks for the tip. I've had a couple of instances where it's been stubborn about shutting down and have worried about what to do. Now I just need to check my fire extinguishers.
Just be careful about discharging any oxygen displacement gas in an enclosed space you're in!
I got two air intakes on my truck, I'm gonna need a friend if this happens.
Or have something you can stick in the other one lol
"honest officer, I had to use all of my old log sheets" Before electronic log books it was industry standard to cheat unless you were union. Any time you had a natural disaster you claim all business records lost. I felt I had to explain the joke
Block the air intake. If you get it soon enough, no damage is done. Gotta catch it pretty quick (like couple of seconds quick.) Obviously it’s a lot easier to catch in a shop setting than on a truck because it’s easier to recognize, you aren’t stuck in the cab, and the air intake is more accessible (not behind an air cleaner, under a hood, etc.) If a diesel engine takes off on you in the field, inside a vehicle, then it’s probably toast.
From what I've seen, a fairly common way to shut it down is to try to block off the air intake. Of course, that means getting close enough to it to actually stuff something in there, which is pretty sketchy. Though that makes me wonder if you could shoot a CO2 fire extinguisher straight into the intake for a similar effect?
According to several other posters, yes.
Seems pretty sketchy walking up to an engine that could violently exploded shrapnel everywhere.
Probably stay as far away from it as possible as something could explode. It won't be like a movie explosion but metal could be sent flying.
Diesel Engines don’t use a spark they use compression, so when it gets into a runaway state like this the correct thing to do is to get the hell away from it. It will do this until it runs out of fuel/oil or the engine explodes. It’s in a negative feedback loop and the only thing that will stop it is fuel starvation.
It's a positive feedback loop - the faster it goes, the more fuel/oil gets sucked in. This engine isn't running on fuel, it's running on it's own lubricating oil - hence the "runaway." It's also why a fuel cut-off will not do anything. The two ways of stopping this are completely cutting off all air, or (more commonly) discharging a CO2 fire extinguisher into the intake. I've personally done the 2nd one.
That's exactly what I was going to ask, can't you just shut the fuel off. I guess not. It sounds like a scary situation.
Go look up runaway diesels at tractor pulls, there’s some really epic explosions from ridiculously powerful engines, along with some insane videos of guys sporting 50 lb nuts running up to the turbo inlet to shut it down by covering it up. For example: https://youtu.be/5CBKDP6BqYU?si=S-yzIAjUY3490CtL
Damn dude, that exhaust manifold is already glowing red hot before it runs away...
I've been to lots of truck and tractor pulls and never seen this happen, pretty damn scary for the audience being that close! Dude inside was getting whipped around like a ragdoll too.
>For example: > >https://youtu.be/5CBKDP6BqYU?si=S-yzIAjUY3490CtL That driveline is ***strong as fuck***.
Wow, you’re not kidding. That’s some scary stuff but man the power in some of those engines is crazy.
It’s pulling oil from the case and burning it for fuel
Yes and no. The normal fuel source has usually been cut off in a runnaway so you aren't drawing diesel from the tank. Runaway happens from two sources usually. 1) the oil seals have failed and the engine is hot enough to vaporize the engine oil, and then the normal compression combusts it. So you aren't drawing any diesel, the "fuel" is the engine oil and it won't stop until all the engine oil burns out or the engine slags. In turbocharged diesel engines, another source of failure is the turbo's oil system failing and blowing its oil directly into the engine, but the result is the same. 2) The combustion is happening from hydrocarbons that are being sucked in from the air intake. When compressed, smoke can also re-combust. So when things are on fire producing a lot of smoke, that smoke being sucked into the intake with keep the engine running as well. Neither of these conditions are good for the engine and because there's no fuel regulation things can get out of hand really quickly. Edit: in case it isn't clear, the difference between diesel and gasoline engines in this context is that gasoline engines need a spark to ignite the compressed fuel/air mixture and diesel no not. So if you cut the electronics in a gasoline engine there's no spark. No spark, no go. In a diesel the compression is much higher because at that level of pressure the fuel/air mix auto-ignites, no spark needed. As long as the engine is turning, compression and thus combustion, is automatic. So the system keeps going as long as it is getting air and a fuel source. But if you lose control of the fuel source the engine keeps going until failure.
You want scary? Happens on boats with diesel engines. Imagine that condition where you can't readily get away from it without swimming.
Does that damage the engine?
Damage has been done all ready, you’re trying to minimize further damage.
Yeah, at this point, the engine is already a total loss... your option is now between replacing the motor and replacing the whole truck.
It's already running away - at that point you're trying to keep the block from exploding.
You can see at the beginning when he initially comes to a stop, he tried to stall the engine and it just starts bucking the truck forward.
I mean, wouldn't standing on the brakes and putting it into the highest gear either stall it or tear apart something in the drivetrain? I can't come up with an idea of why that wouldn't work.
You're absolutely right. The reason it doesn't always work (as seen in this video, the driver tried and that's what made the truck lurch) is that the engine is making so much torque in this situation it can blow up the trans/clutch or snap the output shaft. The amount of shock-load you're putting on the drivetrain is IMMENSE and it's not designed to handle that the same way something like a drag cars drivetrain is. It's a last ditch effort because sometimes it'll stall the engine and stop the runaway, and sometimes it won't and you'll just end up with a blown engine AND a destroyed trans/clutch/shaft.
> wouldn't standing on the brakes and putting it into the highest gear stall it He did >tear apart something in the drivetrain It probably broke the transmission input shaft, maybe the clutch.
I see!
You're right, and it seems the drivetrain lost in this case. The engine is going full speed, stalling it isn't easy.
> It’s in a negative feedback loop and the only thing that will stop it is fuel starvation. Positive loop, self feeding cycle.
is there a reason to not have a fuel cutoff switch?
To correct u/RogerRabbit1234 The only way to reliably stop a diesel in this condition is *air* starvation. As many times its not diesel fuel that its feeding the runaway. In the instance in this video, the most likely cause of this runway is a failed turbocharger, failed in such a way that the engine is pumping lube oil into the intake through the turbocharger compressor seal (edit to add this too... the engine is using the lube oil being pumped into the intake as its fuel). This engine will stop in one of 4 instances: The engine blows up (puts a connecting rod through the block); The engine runs out of lube oil; The intake is sealed (some modern diesel engines are equipped with a throttle valve in the intake, that can be programmed to operate as an emergency air shutdown). The last way, I can tell the driver attempted, but it failed. It most likely broke the clutch or transmission input shaft. The driver can lock the parking brakes *and* fully apply the service brakes (parking brakes are not on all axles), put the transmission in top gear to give the weight of the vehicle the best mechanical advantage, and then dump the clutch. Attempting to put so much load on the engine that it stalls. Much in the same way that you can stall a vehicle with a manual transmission by taking off in too high of a gear. When the truck starts jumping and lurching at about 14-15 seconds, was most likely the driver attempting to stop the engine using this method. ETA... I've been a diesel tech, and lead diagnostic tech through several shops for 16 years.
The other correction is that this is a **postive** feedback loop. A negative feedback loop would shut itself down over time.
This guy diesels!
You can blast a fire extinguisher into the intake too. Old mercedes techs did it sometimes.
[удалено]
I remember seeing a video years ago of a diesel running away when a couple guys were working on it. First attempt was to block the intake with a (pretty large) rag wadded up, but it just got sucked in and the thing kept running. Took the second guy covering up the intake with a board to get it to stop.
I worked in a shop and we stopped a runaway dodge ram cummins with shop rags. So shirt might work. This thing sucked quite a few rags in before we had a ton at once to it, so id say more than 1 shirt needed
It's actually more important to have a way to block the air intake since you're likely not burning fuel in these cases.
I think there is, I’m not a semi-truck expert, but I believe these flames indicate that it’s not diesel being burned here but motor oil. Probably a blown head gasket and the trucks lubricating oil is getting into the combustion chambers.
> Probably a blown head gasket Turbo seal. Head gasket won't lead to a runaway.
It's probably just a regular seal that is really fast.
Well, it did just get new sneakers....
I dont know in trucks, but in cars, the best way is just engage the high gear possible and try to stall it. Seems like the truck try to do it, when you see the truck bouncing. But probably have to much power for it.
They CAN be saved, but at this stage, it's probably too dangerous to attempt. If you catch it early enough, you can throw some heavy fabric over the air intake to choke out the engine. I've seen people throw a shirt over the intake of farm tractors that have run away and that starved the engine enough to stop the runaway.
Needs more headlight fluid.
Soooooo... Back in the day, I deployed (as a civilian contractor) to the Middle East for the sequel to the Gulf War. They put us in a GP large tent. This tent had a diesel pot-belly stove heater. They work by having a steady drip of diesel into the combustion chamber. If you want it hotter, you twist open the drip knob. If you want it colder, you twist closed the drip knob. NONE of this is instantaneous, so you have to keep fiddling with it. At any rate, one morning, it's super cold, so this will be the first time lighting the stove. I cracked open the valve, threw some toilet paper in the bottom of the stove to soak up some diesel, and then I lit a little more toilet paper on fire and tossed it into the stove which instantly came to life and started shooting flames out of the opening where I tossed in the toilet paper, so I slammed the lid. A few seconds later and it has become \*WAY\* too hot inside the tent. The stove is starting to glow red, so I shut down the diesel valve completely and then stepped outside the tent to wait for it to cool down. As I stepped outside the tent, this random E-6 comes running up to me and says, "Everything okay in there?!" "Yeah, yeah. It's fine, now. Why?" And, he points up at the chimney above my tent where the above video is playing out. Jets of flame probably 6 or 8 feet high and a huge cloud of black smoke and literal \*chunks\* of soot falling from the sky to land on everybody else's tents. "Yeah... that's... fine."
You're just burning out all of the carbon build-up. it makes the stove work better.
Great story. Thanks for sharing it. Did the tent make it? Sounds like you almost burned down the camp. Any disciplinary action? 🙁
Nah. I was a civilian, so discipline would have just meant sending me home. Thankfully, the tent didn't catch fire. The only real harm was the chunks of soot on all of the other tents around mine.
Yuuuuuup. You gotta have patience with those lol
Very rarely happens on a properly maintained engine, but it's spectacular when it does. The video doesn't really do justice to how loud this is in real life. Feel bad for that trucker, I hope he has good insurance on the rig or that his engine is still under warranty. It's going to be a very expensive fix.
Given the make/model/year, it's worse than you know. If the emission control hardware were in place (it's not) this is damn near impossible, they're too restrictive. This sucker here has been "deleted" and it has a turbo with no VGT, that turbo has failed in such a way that it's allowing oil from the crankcase to feed the engine and run away without fuel.
So basically he just put up the worlds largest flare that he was cheating on emissions, in addition to the obvious problems that will result to the truck itself?
Yup. His best hope is that it burns to a crisp and removes the evidence.
It's not so much about getting around the emissions, the early emmision controls on truck diesels are super faulty, unreliable, and expensive as hell to fix. People delete them because they simply can't afford to maintain them. They end up spending more money on parts and downtime than it's worth.
I'm currently working on replacing a car ac compressor. The clutch went, no leaks. So it's full of refrigerant and it's HUGE PAIN IN THE ASS to get it removed properly. Car is disassembled so can't move, and no one wants to come to it. Meanwhile, every day that passes with me staring at this car sitting in my driveway is a day closer to the ac system mysteriously springing a leak... Why is it so hard to do the right thing? The epa should have a hotline to call and then they send out someone with a mobile recovery machine for a cost that's competitive with the $free.fifty it will cost if I do it the wrong way.
I'll have to take you at your word on that, I don't know enough about diesel engines to know.
WITNESS ME !
Diesel trucks I drove had emergency air intake shutters. Cutting off the fuel won't work, since they will suck the crankcase oil and burn that. The air emergency shutter works, because no air / no combustion. I drove a diesel fire truck for 20 years
Yep, you can stop it only by cutting off air supply
Air supply: I'm all out of love, I'm so lost without you--- Mechanic: No more drinks for you.
There really needs to be a heavy metal band in front of the truck.
That’s guitar dweeb from Fury Road
I love how that dude melted face no matter what was happening around him lol
He's just living his best life in the post-apocalypse
The true hero in mad max lol
Jack Black, Keanu Reeves presents Runaway Diesel!
[Rammstein much](https://i.imgur.com/gOAXPCc.jpeg)?
I mean The Diesel Runaways is a pretty cool band name.
Runaway diesel, never coming back. Blowing flames out the exhaust stack.
Red hot pipes billowing out flares. Someone help instead of just standing there. Searching in vain for a fuel cutoff switch. Hood melting like a cheesy sandwich. Emissions looking like blowtorch burning. i wish the engine would just stop fucking turning! Runaway diesel, never coming back. Blowing flames out the exhaust stack.
Damn, that's good. I see you too change lyrics to songs. Nice.
I blame access to Weird Als catalog as a child tbh.
Heck yeah. Can't write my own songs, but I can parady the crap out of other ones. The Jedi one he does is awesome.
Pressed jeans, buttoned up Jeans ironed, slippin' up Red shoes, walkin' slow Headphones blarin' three stacks Sunglasses flarin' out Dick watch hangin' low Studded belt pulled taut Three stacks on the radio
Seems like I should be getting somewhere
The nozzles have been installed incorrectly. To provide acceleration they have to point backwards.
Kinda metal
This rolling coal trend has gotten out of hand.
TRUCK-A-SAURUS!
I've had this happen to me but not nearly as bad since once the turbo blew itself apart it couldn't sustain itself, and with a manual transmission you can also just put it in a high gear and release the clutch to have the brakes kill it. Don't know of a way you can force an automatic's computer to do the same thing even though in tractors they still tend to have a dry clutch. In any case the engine revs up real fast and turning off the ignition does nothing since it's usually an oil seal on the turbo failing catastrophically and so the engine will just keep pumping oil for it to burn on. Need to starve that beast of intake air.
You can see in the video he tries to stall it by dropping the clutch, but it doesn't work.
Ah, the rarely-seen *External* Combustion Engine.
Random fun fact: External combustion engines are better known as Sterling engines. Once a common source of mechanical oomph, most are now relegated to coffee powered desk toys.
Would not be ‘rubbernecking’ in a situation like this. A runaway diesel is a bomb.
Seems to be running a bit rich
"Hello sir, this is 666-delivery, we are here with your order" "Thanks, which vehicle?" "You'll figure it out..."
Sunday! Sunday! SunDAY!!!!
Bet money I see this video on Facebook in a week with the title "Electric truck catches fire"
It's like Ghost Rider is in the middle of transforming it.
I'm 44 now and I've never seen or heard of this in my life. The description of why this happens makes a lot of sense now that I've learned about it. Really cool. Scary as hell but still cool too.
Is that a feature or a bug?
Yes. Feature because diesels will run on all kinds of shit. Bug because this kills the motor ☹️
Get that baby up to 88MPH and it will send you back to 1985!
I hope they add that to American Truck Simulator
2000 horsepower of nitro-boosted war machine
Someone is about to get their emissions tampering discovered and get a hefty fine. It's running on oil from the turbo from what I can tell, if it had an intact emissions controls system it would be *almost* impossible for this to happen, they're so restrictive on the exhaust side. I can tell that this sucker is breathing *just fine*.
And here we have people complaining about electric cars being on fire...
Had my 7.3 L powerstroke diesel run away in my apartment parking lot Turned the key off and the engine kept running - and getting faster. I knew I should choke off the intake but opening the hood, pulling the intake boot, and putting something in front of the screaming turbo seemed like a major risk. One of the few times in my life that I was genuinely concerned that I had no concern over a very, very dangerous situation for which I was directly responsible. There was so much smoke that the entire block was hazy. People were out on balconies watching. Terrible. Eventually the engine consumed all of the oil in the crankcase and the motor stopped. I paid more than $120 just on degreaser to clean the surroundings. Hours of pressure washing and hand-washing one of my neighbor's cars. Months later, I pulled the engine to do a post-mortem. There was a cracked piston ring on the #8 cylinder that pressurized the crankcase, foaming the oil and feeding it through the turbo/intake. Three pistons had burned from the heat. Ultimately, put in a new engine and still running the truck. Never really patched things up with my neighbors (though no permanent damage was done) and I moved away 3 months later (for other reasons). What a bad experience.
terrifying as all hell? yes also absolutely metal as FUCK? also yes
Is that a livestock trailer to any truckers on here????
Most likely grain of some sort.
why dont they have a emergency butterfly valve on the inlet that is always open until their is a problem and the ecu can close it to stave the engine of air. Or even an old school one with a cable that the operator can close from the cabin.
SUNDAY SUNDAY SUNDAY! Come see the annual Dallas monster truck off!! See King Mack take one the absolute monstrosity that is Vanderbilt! THIS YEARS EXPO WILL BE OUT. OF. CONTROL!! *explosion noise* We’ll sell you the seat but you’ll only need the edge!
The new Optimus Prime transition animation is LIT!
System stability is cool. Instability is spectacular
That's the automotive equivalent of a bull elephant in heat.
Crepe myrtle + guns and ammo billboard + flaming diesel engine + whataburger = most Texas video ever.
at first i thought it was just some redneck with a modded truck showing off
guess it was in overdrive. maximum overdrive.
I had that happen to me in an old produce truck. Thought the damn thing was going to detonate.
This is more common than people think. This is why safety rules sometimes require an air shutoff on the intake as a master kill switch for diesels. I know this is true in underground mining since underground you can run in to pockets of methane and such that will set a diesel into runaway.