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 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

49,095

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.

4 people found this helpful.
20

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

2 people found this helpful.
40

bad wire on passenger side fender

4 people found this helpful.
70

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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