Question about 1988 Ford F 150

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It will not stay runing replaced fuel pump

I stoped at a light and starded and the truck just stop runing i have 2 tanks .

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  • rerun2marie Mar 02, 2009

    replaced fuel pup replaced relay and checked kill switch, still no luck w/fuel pup turning on

  • Dana Chella
    Dana Chella Apr 10, 2009

    I have the same problem....I bought new relay, external pump, and even PCM...but yet there is no juice going to the pump.

  • robert pergola May 11, 2010

    which pump did you replace?

  • Angelo Attard
    Angelo Attard May 11, 2010

    hi need more details



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Had the same problem. Have a 6 cylinder with 2 tanks. My truck has 3 pumps. One on the frame and one in each tank. I ended up replacing all 3. Two of them twice due to defective pumps. It would run fine for short distance but left me on the side of the road many times. It would start back up after sitting but eventually got where it would not start at all. Noticed that there was not much fuel pressure at the fuel rail when this happened. You should have a valve that looks like a tire valve at the back of the engine where the fuel hose meets the rail. When running or when key is turned to on position, it should have a strong stream when pushed in. I also noticed that the pump on the frame became very noisy right before it stopped running. I think the tank pumps were not supplying fuel to the frame pump. Check to see if you can hear the pumps when running. If it won't run, have someone cycle the key on and off and switch tank selector while you listen for each one humming. You should be able to hear the tank pumps through the tank fill necks. If you can't hear a pump, it's probably bad. You can check them once you get them out by attaching wire to the terminals and touching to the terminals of your battery - positive to positive, negative to negative. They should run. I would also check for any corrosion and loose grounds at the plugs of the harness. I had a problem with this once also.

Posted on Mar 14, 2009


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