I have replaced the IAC because it was stuck. Also replace air flow sensor because it was sending a bad signal. Engine has 180 PSI compression. If I richen fuel mixture by 25% it will idle. Runs good at higher RPM. Have no engine codes.
computer needs to relearn, you said no codes or check engine light, have you tried driving it at least in an hour? stop and go, on a highway, et cetera
