Will idle air control valve cause an engine to idle to fast?

1988 FORD F-150
200,000 MILES
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JACKIE48
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  • 1 POST
When the truck is just idling, it idles at 3500 rpms. If not the valve, what could cause it?
Mar 15, 2012 at 5:44 PM
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FIXITMR
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throttle not closing tight/big vacuum leak.
Mar 15, 2012 at 6:15 PM