Vehicle has rough idle when started. Seems to be running five cylinders. After short period of time, maybe after driving one block, idle smooths out and vehicle runs fine. I drive on the interstate, runs fine. If vehicle is turned off, maybe in as little as 15 mintues, and is restarted, again idles as if running on five cylinders. iChecked trouble code, stated misfire on cylinder one. Replaced spark plugs, no change. I am going to do the spark plug wires next, but have never seen wires cause this problem. In past, wires seem to get worse (cut out) after warning up. Do you feel this is instead an injector problem?
Aug 11, 2009 at 11:27 AM