I have a 2000 chevrolet 1500 z71 with 151000 miles on it and while im driving down the road around 50- 55 mph or while the rpm meter reads 1500. the rpm meter will jump up and down and the engine will rev up and down while im driving. This is making my gas milage go way down.. whats wrong with i?
Dec 28, 2007 at 5:30 PM