Mechanics

IDLE PROBLEMS

1988 Ford F-250 • 197,000 miles

Hi guys, I have a 1988 ford f250. When I start it, it idles at around 850rpm but then jumps to 1900rpm. After a little while it will drop to 850rpm again but then will jump back up to 1900rpm. Could this be a throttle position sensor problem? This is driving me crazy. Any thoughts?
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Roadgear
September 30, 2012.



Do you have any codes?Lets start there.

Saturntech9
Sep 30, 2012.