TAPPING INTO THE MECHANIC KNOWLEDGE BASE. TRUCK RUNS SMOOTHLY AT LOW RPM. AS I ADD MORE THROTTLE, THE ENGINE BOGS DOWN BIG TIME. I CHECKED THE FUEL PUMP AND IT APPEARS TO BE PUMPING PLENTY OF FUEL. I CHANGED THE FUEL FILTER. I OBSERVED THE EXHAUST PI
1991 Ford F-250 • 10,000 miles
Tapping into the mechanic knowledge base. Truck runs smoothly at low RPM. As I add more throttle, the engine bogs down big time. I checked the fuel pump and it appears to be pumping plenty of fuel. I changed the fuel filter. I observed the exhaust pipe when I had my wife floor the running engine, and it appeared as though there was some unburned fule coming out the exhaust. Any ideas?
May 15, 2012.
May 15, 2012.
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