1990 Cadillac Deville engine idle

1990 CADILLAC DEVILLE
160,000 MILES • V8 • FWD • AUTOMATIC
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JAG
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i have a 1990 deville with a 4.5 v8 front wheel drive when you start the car the engine idels high once you put the car into drive the idle comes down but also noticed that it seems to accelarate on its own at times could this be my map sensor ??? any sugestions
Oct 7, 2008 at 8:15 PM
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DOCFIXIT
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Maybe a problem with the Idle Speed Controler sticking open. It's on the throttle body couple of witres to it. Remove and clean with carb cleaner. See if that helps.
Oct 9, 2008 at 10:27 AM
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JAG
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ok thanks i will give this a try i will let you know how i made out with this.. jag
Oct 9, 2008 at 12:57 PM
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DOCFIXIT
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Let me know and we'll get it running good
Oct 9, 2008 at 1:55 PM