Question about 1996 Ford F250 Crew Cab

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Bad gas mpg and popping

F250 1996 rebuilt just recently but not my cam and lifters its getting 9mpg and popping out the trot body changed mas air flo sens fuel filter wires plugs coil but no change whit might it be:?

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  • cdinstardust Oct 18, 2008

    I have perfect timming with a timming gun and elimiated all the vacum except the map sensor and still no change. I do thank you very very much for that advice , any other sugestons I'm ALL EARS. Thank you and have a nice day.

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There is a chance that your catalytic converter may be clogged. Sort of like a potato in the tailpipe choking the engine.You can check this by monitoring exhaust flow or disconnecting exhaust prior to converter and see if anything changes. You might take it to a shop that has an exhaust back pressure gauge. With that they can see if there is a variation in pressure before and after the cat. hope this helps.

Posted on Oct 22, 2008

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I would start by checking the timing and for vacuum leaks

Posted on Oct 18, 2008

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Pops while pushing the gas back fires smells like gas shakes while pressing the gas on 91 jeep cherokee l 4.0


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