2001 Saturn Engine Revs

2001 SATURN
128,000 MILES • 4 CYL • 2WD • AUTOMATIC
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JIMBOT
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When the car is in drive but at a stop the RPM's rev extremely high. It does while it's in park as well but less frequently. I turn off the A/C and it still does it. This first happened about 3 months ago and then it stopped after a couple of days. Now it does it every time its driven. What could this be? Thanks
Dec 4, 2007 at 10:45 AM
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SERVICE WRITER
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Couple thoughts. a vacuum leak that is allowing unmetered air into the system.

I have seen a TON of coolant temp sensor that are bad on these. It sends the wrong signal that richens the mix up.
Dec 6, 2007 at 7:40 PM