1998 Ford F-150 idle control valve

Tiny
JAMES BARBOSA
  • MEMBER
  • 1998 FORD F-150
Engine Performance problem
1998 Ford F150 6 cyl Two Wheel Drive 129000 miles

how it works
Tuesday, August 31st, 2010 AT 11:20 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Here is a good definition that I was able to find.

The Idle Air Control (IAC) valve adjusts the engine idle speed. The valve is located on the side of the throttle body. The valve is controlled by a duty cycle signal from the PCM and allows air to bypass the throttle plate in order to maintain the proper idle speed.
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Wednesday, September 1st, 2010 AT 6:58 AM

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