Another Vibration
My 1999 Ford F250 has an awful vibration when I take it over 2500 RPMs. It is also idleing hard and when I step on the gas it puts a puff of black smoke out the exhaust. I can't take it in till next week. It wasn't very long ago when I had a injector go out on it but it acted the exact opposite. Could it still be an injector? Other then that it runs fine. Thansk
Cori


