1992 ford f150

Asked by Cody Jan 08, 2017 at 04:53 PM about the 1992 Ford F-150 XLT Lariat 4WD LB

Question type: Maintenance & Repair

Hey guys I have a 1992 ford f150 with the 5.0. My
question is when I turn the key on to cycle the fuel
pump the pump won't stop running till I turn my key
of what could be wrong with it?

6 Answers
34,735

lrodri911 answered 7 years ago

Not building up pressure. Bad pump, bad fuel pressure regulator or restriction on fuel line

Mark helpful
34,735

lrodri911 answered 7 years ago

Reading up on some threads, fuel pump should not run continuously, if it does and relay is ok and wires are not shorted, you have a bad computer

Mark helpful
220,815

Rowefast answered 7 years ago

Irodri911, shouldn't the fuel pressure be checked first? The guy didn't say he was having any problems but if the pump pressure is on the low side or under, think it may be possible that the pump does not build up enough pressure to turn off?

Mark helpful
220,815

Rowefast answered 7 years ago

30 to 45 lbs is what the fuel pressure should fall into. I would say to start investigating by checking the fuel pressure and go from there.

Mark helpful

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