1996 Chevrolet Corsica Repair Question
Why does car idle rough and surges when stopped?
try cleaning throttleplate and iac valve hole with choke cleaner and see if that helps. clean throttle plate on both sides.
i just did that today
ok then scan for codes and check fuel pressure. then check for vacuum leaks. make sure the throttle plate is clean on both sides though with no residue and wipe around inside of where plate touches. also you can't have any holes between the throttle plate an dmaf sensor.
The check engine light is not on will there still be a code to retrive? The only light that is on is engine coolant but that has always been on since i bought the car
it cold be an idle air control valve then if you have done everything i've suggested. you should fix the engine coolant light as that could give aproblem as well.but recheck for codes, most auto parts stores do it for free.
Yeah i was wondering about that also, but was told to replace the TPS instead. Thanks for all the advice