Engine Performance problem
2003 Ford F250 V8 Four Wheel Drive Automatic 116000 miles
Hiya, I have a 2003 F250 Diesel Super Duty turbocharger @116000 miles. The truck feels like it is missing on a cylinder at idle. Upon constant acceleration it runs good and no problems are noted. When I get to cruising speed and throttle back then any additional movement (other than a hard acceleration) on the fuel pedal causes the engine to stumble. Feels like I am driving over an extremely rough road. If I accelerate hard it will then again run good. On some occasions--NOT ALWAYS--it acts and sounds like it is back firing through a carburetor. Which of it doesn't have. Exhaust soot is black and glistens. I have changed both fuel filters and have been adding CETANE fuel additive.
Thursday, April 29th, 2010 AT 9:39 PM