I have a 2003 Pontiac Grand Am 3.4 liter. Sometimes the engine starts revving high uncontrollably. It doesn't happen all the time, but when it does happen, it does it sometimes when I start the car, or when i'm driving down the road, or when i'm sitting at a stop light. I tried replacing the idle air control valve and the throttle positioning sensor, but it still does it. Any ideas?
Sunday, September 4th, 2011 AT 5:46 PM