Fast Idle on a 2000 Saturn SL


#1

My Saturn idles at 2400 RPM; I’ve replaced the Air Idle Control Value, the Throttle Position Sensor, all with no luck… Could you give me some advice on how to bring down the ide?


#2

Yes, find the vacuum leak. Vacuum leaks can occur from vacuum hoses. Disconnect the vacuum hoses, including the one to the brake booster, one at a time, and tape over the holes on the intake manifold. Does the engine idle slower with a vacuum hose disconnected? Check the large plastic intake tube for cracks and fit. Check the intake manifold for cracks. I hesitate to advise you to use a vacuum test gauge on the intake manifold.