88 F150 Will not start

[hellbender23]

I have a 1988 Ford F150 with a 4.9L 300ci motor, here is the problem, I was driving to work and the engine just quit. I tried to get it started again, but it would not. I pulled it home and checked the fuel pump to see if it was running because I could not hear it running, and it was not. So… I replaced the fuel pump and filter. It ran great for about 4 days. And once again the motor cut off out of the blue. Now I have check the fuel pump to make sure it was still working and it was, in fact it had great pressure. I have pulled the spark plugs to see if it had fire, and I did. I know its getting fuel to the motor because it will fire the motor off for about 3 sec. every once and a while, and will not start again. I am at a loss. Thanks for the help.

[pete54ford]

How does it sound when you turn it over? Does it "fight" its self? Not sure not being there, but I wonder about the timing.....or maybe your pump is weak and has just enough umph to get some gas it to it. Dont really know....sorry but good luck!

[hellbender23]

No the motor turns over good, but every once in while it sound like it’s just about to start but doesn’t. Like I said before, I was driving the truck and it just died out of the blue, almost like I had turned the key off. I have checked the spark plugs and they are firing off, and the engine is getting fuel, new fuel pump.

[amac209]

double check all the wiring to the fuel pumps and the relay. i think it's located behind the glovebox somewhere on your truck. also check the relay wiring ford wiring is famous for corroding and causing a voltage drop. you can jump the fuel pump from the eec conector i don't remember which terminal it is but a good manual should help you out. good luck. oh yeah check the inertia switch too it's located up by the brake pedal somewhere.

[Tesha]

Hell... i was wondering if you have figured out this 'fuel problem'. I also was driving last week and my truck turned off. I checked and replaced everything, including the fuel pump twice. I've checked all the wiring, there is power running everywhere it needs to. It almost appears there is a MASTER reset smitch somewhere. After about 600.00 in new parts, im bashing my head on a wall. Let me know.

[VinceRouse]

Tesha,

I am not sure what year vehicle you have. I have a '92 F150 and yes there is a master switch. On a 92 F150xlt it is behind the cowl on the passenger side (If you are sitting in the passenger seat it is closest to your right foot). There is a red button. It says right on the engine that this breaker is intended to prevent fuel leaking in an accident. It says that it can be triggered just by hitting a pot hole. (Seems silly to me, but there you have it. )

-Vince

[pete54ford]

A pot hole??? I have never had that happen to me and I use it for "field" fence checks. But I guess....anyway, check your dist. cap and your rotar. My 1986 f150 just did the same, and thats what it was, I to was checking fuel pumps and everything else related to the fuel. But good luck!!