Question I sure hope ypu can resolve this prblem. My daughters car, Cavalier, Head head gasket,wires, ignition coils,timing chain,cyl. head checked,timing checked by mechanic. The mechanic charged my 1100.00 and still idle terrible.Runs above idle very good, just idle. ANy suggetsions? HELP! thanks Kevin Savadge
AnswerHi Kevin, The one thing you need to do is make sure that there isn't any vacuum leaks. This would also include the pcv valve, could be stuck open. If all is ok there make sure that your engine mounts are ok. Sometimes a mount will ground out and cause a vibration in the car making it feel like it's running rough.
Let me know what you find
Have a Nice Day Mark