1997 Oldsmobile Cutlass Supreme mileage: 115,000. On cold starts, the idle speed is between 2400-3000 rpm. My local GM dealer did a computer diagnostic and replaced the PCM. Still had the problem, and they said it was probably the idle air control valve. That has been replaced too, but the problem persists. One other thing I have noticed is that with each new part, the idle speed is somewhat better but then progressively gets worse. Any ideas?
Tuesday, November 9th, 2010 AT 12:24 AM