2002 Oldsmobile Bravada Engine reving up and down while par

2002 OLDSMOBILE BRAVADA
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JAHLV03
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Engine Performance problem
2002 Oldsmobile Bravada Automatic 27900 miles
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my engine, when i come to a complete stop, the RPM shows (and I can hear it) the engine revs up and down and down almost to the point where it sounds like its going to die. I just had it checked for everything recently and the mechanics say that there is nothing wrong. why is my car reving up and down while i stopped?
Apr 30, 2008 at 7:54 PM
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LEGITIMATE007
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sounds like your iac(idle air control valve) is malfunctioning.have checked/replaced if necessary. Also make sure all of your vacuum hoses are on and not cracked or disconnected.
Apr 30, 2008 at 8:53 PM