The engine will increase revs to 3000rpm without reason especially at low speeds or when stopped in traffic or at lights. I can get the revs to drop if I gently apply pressure to the clutch; but if the clutch is fully depressed the engine revs resume to the 3k rpm. The car is also guzzling oil but there is no pooling of oil under the car. The check engine light has not displayed; the idiot lights are functional. Start up is not a problem. Shut down however sounds like a stall out.
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I don't have an answer--my 1998 Saturn SL2 is doing the same thing. Used to be that adding oil would resolve the problem. That's not solving the issue now. Revs to 2000rpm at idle (normal is about 900) and diesels violently at ignition shut-off.
Its a GM auto correct? Check out the list of recalls for their cars & trucks , its a big list. Maybe some of your problems on on their. The List is long, so be patient.
