Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: Engine running rough on 1995 Oldsmobile Cutlass Supreme

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Engine runs rough at all speeds. No engine codes showing up. Changed spark plugs and wires problem still there. Engine is not overheating. Idle seems to be high around 1000 rpm. Kind of runs as if there is a vacuum leak but so far I can't find a leak. Engine seems to start ok. Problem just appeared. I don't hear and odd engine knocks or noises other than some valve tapping noises, but that has been there since I bought the car.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Sounds like a vacuum leak or a sticking idle speed control motor. You have the right idea. Keep looking for any disconnected hoses, air tube cracks, etc....
Didn't find what you were looking for?