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

Tiny
JACKIE48
  • MEMBER
  • 1988 FORD F-150
  • 200,000 MILES
When the truck is just idling, it idles at 3500 rpms. If not the valve, what could cause it?
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Thursday, March 15th, 2012 AT 5:44 PM

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Tiny
FIXITMR
  • MEMBER
Throttle not closing tight/big vacuum leak.
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Thursday, March 15th, 2012 AT 6:15 PM

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