2001 suburban 5.9, 90000 mi. When its a cold start situation(morning, afterwork) the engine runs ruff. DTC is PO300, multiple cylinder misfire. After car warms up it runs fine. Mechanic says he dealt with same car & problem last year. It was STUCK VALVES. Cost 1600.00. Unable to afford this right now. What will go wrong if I continue to warm it up and drive it? Any way to stop the unsticking if this is the problem? Could it be anything else?
Sunday, January 28th, 2007 AT 9:25 PM