Question:
I have a 1992 Ford F150 that I drive daily to work. Drove home after work a few days ago (it ran great on the way home), parked it, went out the next day to go to work---wouldn't start. Battery tests good, put on new plugs(6), new coil, new relay, new battery cable ends, new fuel filter---nothing. Checked fuses, all are testing good. Looked for and "in-line" fuse that is supposed to go to the fuel tanks (dual tanks on this truck), and I cannot find it. Where is it? Also, what do you think the problem might be? I can't seem to hear the fuel pump pumping during the times I have tried to get it cranked.
Answer:
Have you tried both tanks? The engine really only needs good compression, spark at the right time and adequate fuel pressure. Since you drove it the day before, it sounds like you have good compression. On top of the fuel rail, there's what looks like a little schrader valve which is the fuel pressure port. Pressure should be in the high 30's to low 40's psi with the key on but engine off. Then check to see if you're getting good spark while cranking the truck.
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