94 7.3 powerstroke manual dies at 40 mph

10

Asked by Sean Feb 03, 2019 at 11:37 PM about the 1994 Ford F-350 4 Dr XLT Crew Cab LB

Question type: Maintenance & Repair

The truck will idle all day I can drive in first and
second and third but as soon as I'm but to shift to
4th at about 40 mph the check engine light will
come on and the truck will die can not keep it
running no matter what you do

3 Answers
10

A4efrt answered 5 years ago

My son has a f350 superduty powerstroke turbo I asked him about your truck he said maybe your fuel pump is going out that in 4th gear your drawing a lot more fuel.

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10

Sean answered 5 years ago

My fuel pump is good it's a new and I checked my fuel pressure and its fine the truck goes into pump mode and and I can't keep the moter going at all when the check engine light comes on won't throw any code but as soon as I turn the truck off and turn it back on it will crank right up and it will idle all day long and can drive at 35 as long as I want but as soon as I go 40 goes into limp mode slows down even if I push in the clutch and down shift still won't go half to turn it off the light goes off and crankes up everytime

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