My son has a 1994 GMC Sonoma that you have to pump the gas in order to start it. Once its started, it runs a little rough and the RPM peg will move-it does not jump around a lot but there is noticeable movement. Once you are driving the veh, there is no issue until you stop and are at idle again. We repl the plugs and wires along w/the distrib cap about 2 mos ago. The veh is throwing a code for the throttle position sensor but the code just came on in the last few days and the running issue has been going on for about 2 weeks now.
Aug 14, 2009 at 4:48 PM