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Inconsistant Idle

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andrewjscott

15+ Year Contributor
326
3
Oct 16, 2004
Sidney,
I have noticed lately that my car has had a very inconsistant idle. When the car is cold it obviously idles higher but once it warms up it idles at 850-900rpm OR 1500RPM. It doesn't bounce inbetween, it stays stedy...sometimes its low, sometimes its high. I've noticed after a quick run at WOT it seems to return to around 900 rpm. But driving around the city, seems to idle at at a stedy 1500 rpm. Any ideas on what is causing this?
 
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