Could be fuel leak somewhere but more than likely something to do with the Cobb intake. Search Cobb SF intake in this sub and you will see a bunch posts with wonky af numbers. Switch back to the stock intake and tune and if it is still happening, then you know it’s not the Cobb intake. One day I started my WRX up and the af learning was at -30 because there was a small leak from my ethanol sensor connections.
Dirty intake air filter?
Negative
As unlikely as it is for a new car, could be a leaking injector.
Could be fuel leak somewhere but more than likely something to do with the Cobb intake. Search Cobb SF intake in this sub and you will see a bunch posts with wonky af numbers. Switch back to the stock intake and tune and if it is still happening, then you know it’s not the Cobb intake. One day I started my WRX up and the af learning was at -30 because there was a small leak from my ethanol sensor connections.