revving engine on 2002 Dodge Ram 1500

engine revs on it's own when outside temps get to 50 degrees or less.does it all winter til spring gets here and temps rise again.any ideas on what the problem might be

by in Sanborn, NY on November 06, 2010
1 answer 1 comment
ANSWER by on November 06, 2010
The computer in your truck that controls fuel mixture and idle speed looks at coolant/engine temperature and ambient air temperature. A scan tool can read theses sensors without having to do intrusive testing at both sensors.
COMMENT by on November 06, 2010
told it was throttle body being dirty,had it cleaned,but problem continued..i will have what you suggested checked out.thanks for your time.....
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