The description sounds like it could be almost anything. From a plugged exhaust system, bad fuel pump, bad fuel regulator, EGR stuck open, purge solenoid stuck open and more. It needs to go to a shop and have it actually scanned and some diagnostic tests performed. The other option is to spend a bunch of money swapping parts until you get lucky or go broke.
You didn't post which engine you have so that also hinders the process.
Dec 5, 2019 at 12:24 PM
(Merged)