when idling (hot or cold) and under light acceleration, my car runs rough. its sorta like a vibration, almost like a intermittent miss. its kinda hard to explain. its almost like one of the motor mounts is going bad. i have a 89' Corvette with the L98 and auto trans. i kinda think it is the fuel pump starting to slowly go bad, as its been doing this for a few months now. this only really began when i ported my plenum, installed a 160* stat, and relocated my MAT, but that probably is just coincedence. any suggestions?
Junior Member
Check the following
Fuel Pressure (under load and at idle)
Plugs ( rich or lean )
Injectors (ohms)
Do you see black smoke?
Are you in closed loop?
Fuel Pressure (under load and at idle)
Plugs ( rich or lean )
Injectors (ohms)
Do you see black smoke?
Are you in closed loop?