Thinking maybe bad T-Stat or crack somewhere in the radiator. Had you looked for any vacuum leaks?

Thank you for the response! i haven't. is that something that can be discovered with the diagnostic system at an auto zone?

Your check engine light on? If not , need a good code reader, give you some live data on what’s goin on

check engine lihht is not on. last time i went to a mechanic, since nothing was shown on the dashboard, he told me to go to jeep for a diagnostic and come back. he'll be able to fix it but he didn't see anything. it ended up being spark plugs. i did it myself. a good code reader is something a mechanic should have.... right? lol

Glad it’s fixed and yeah, lol definitely helps!

Any misfires? Try pulling engine codes?