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Try cleaning the throttle body. Carbon usually builds up causing the idle air control valve to malfunction. Yes...as the previous answer says. Remove the large oval air housing from the intake and locate the "flapper" inside. This flapper i believe will be closed. Use your finger to flip it open and spray carb cleaner in there and use a rag to remove the black powder that's built up on the inside of the housing. Believe it or not but this slight build up causes the flapper thing to not close all the way! Don't spray a ton, you're only trying to clean where the flapper thing contacts the housing wall.

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โˆ™ 2006-01-11 06:11:10
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Q: 1992 Lumina idles too high 2000-2800 rpm when cold and around 1500 rpm when warmed up Drives fine but idles at 1000 when at a stop sign IAC is ok?
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