My F150 will not keep running it wants to start but will not......replaced cylinoid, electronic control modular, and I am thinkin its electrical or the fuel pump......?!?1 I am not sure please advise????
25

Asked by melr44 Sep 16, 2007 at 01:42 PM about the 1991 Ford F-150 XLT Lariat Extended Cab SB

Question type: Maintenance & Repair

My F150 will not keep running it wants to start but will not......replaced cylinoid, electronic control modular, and I am thinking its the electrical system or the fuel pump......?!?1 I am not sure please advise????

Respectfully,
Courtney L. Rogers
216 651-9796

4 Answers
83,795

littlehorn answered 16 years ago

Does it run and stall, or not run at all? It may be as simple as the starter not turning fast enough, or fuel pressure. Try doing a fuel pressure test on the system. Listen for the fuel pump to whirr for about 15 seconds when you turn the key to start as it pressurizes the system. If you're not hearing this, it's fuel pump or relay. You may also have other problems, drop me an email once you've done those things.

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williegenefam5 answered 11 years ago

I changed the fuel pump in one tank cylinoid,comtrol modular, coil, is there and where is a 3rd pump?

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3,655

Randy answered 6 years ago

fuel pressure will build when you wait on the pump to work with key on??? hmm, very good to know 'horn. interesting, I'm disappointed that I was not aware of that((

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