Engine Mechanical problem
1999 Other GMC Models V8 Four Wheel Drive Automatic 136000 miles
when engine is cold it runs real rough. No power back fires. When warm runs better but not full power. I have changed mass air senser, egr valve throttle position senser plugs wires, checked pressure in cats and fuel pressure is good, and I changed fuel filter can u please help
have the same problem?
Sunday, September 27th, 2009 AT 3:47 PM