Mechanics

ENGINE BOGS DOWN WHEN I GIVE IT GAS.

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?
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Clifselina
May 15, 2012.




Sorry, it appears to be soot filled condensation, my hands smelled of fuel.

Tiny
Clifselina
May 16, 2012.
5.0?

Tiny
Fixitmr
May 16, 2012.
When did this start happening?
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Tiny
Fixitmr
May 16, 2012.
460. I think 7.5

Tiny
Clifselina
May 16, 2012.
Just today. I am in a bind, as this is my only vehicle.

Tiny
Clifselina
May 16, 2012.
Check MAP/MAF sensor.

Tiny
Fixitmr
May 16, 2012.

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