WHY DOES MY TRUCK IDLE FAST ALL OF THE TIME.

  • Tiny
  • shane68
  • 1992 Ford F-150
  • 174,000 miles

I have a 1992 Ford f-150 4wheel drive. When started it the motor races for about 20 minutes and then it will idle down to normal. When I accelerate it races again. I have replaced the idle sensor. It was a wire underneath the air intake. That did not fix the problem. Not sure what to check next.

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Saturday, February 11th, 2012 AT 3:44 AM

1 Reply

  • Tiny
  • DrCranknWrench
  • Expert
  • 3,458 posts

Here is a walk through diagnostic.
Just use this link to get to it.

http://www.2carpros.com/articles/engine-idles-too-high

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Saturday, February 11th, 2012 AT 3:56 AM

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