Engine Idols high 2-2.5 RPM

[chandracz]

Hi,

I have a 2001 SL1... Sometimes my engine will idol higher than normal. This doesn't happy everyday and I haven't found any specific circumstance that may be causing it to idol high. When it does happen, it's when i'm in Neutral or Park. It idols about 2 to 2.5 rpm when it's idoling high.

[drew300]

My '99 SW! had the idle go high, but only to 1400 or so.
The intake gasket went bad, allowing mmore air in, so the computer matched the fuel to the air.
I used "throttle body cleaner" to check the gasket. Just spray a little around the intake gasket, with the engine running. A leak will pull the revs up. I understand #1 cylinder is usually the 1st to go. (by the fan belt) Mine also looked bad at #4, which if it had gone would have let coolant into the cylinder.
I had the shop change mine. It looked like a pain to change. In the shop I noticed they removed the top motor mount. Maybe this allows the engine to be pulled forward for more access to the gasket.