Mechanics

WHY DOES MY TRUCK IDLE FAST ALL OF THE TIME.

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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Shane68
February 11, 2012.




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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