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?
Sunday, September 30th, 2012 AT 4:44 AM