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    N0help4u's Avatar
    N0help4u Posts: 19,823, Reputation: 2035
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    #1

    Aug 17, 2013, 12:10 PM
    No fuel pressure
    2003 F 250 xl super duty 5.4
    Tried 9 different fuel pumps, fuel pressure regulator and a fuel filter
    Also tried changing the voltage. Still only getting 5 to 12 pressure then cuts out.
    What else might be wrong?
    N0help4u's Avatar
    N0help4u Posts: 19,823, Reputation: 2035
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    #2

    Aug 17, 2013, 12:42 PM
    He changed the frame filter. Where would a filter under the hood be? He said it seems to be coming from the pump not getting enough pressure. Mostly 5 lbs pressure, twice it got almost 12 lbs pressure.
    All Advanced Auto sells is Airtex pumps and we tried at least 5 different ones of those.
    Then we tried 2 Carter fuel pumps from Pep Boys. I don't know where around here to buy motorcraft fuel pump.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #3

    Aug 17, 2013, 01:16 PM
    I was thinking, at first, that you had a diesel engine.

    . Remove and clean the fuel pump fuse's contacts, in the under hood fuse box, with abrasive cloth.

    . Remove and clean the fuel pump relay's contacts, in the under hood fuse box, with abrasive cloth. Coat the contacts with dielectric grease. Test the relay--replace, if necessary.

    . Clean all fuel pump grounds.

    . Install a Motorcraft fuel pump, if the problem persists, which are available at your Ford dealer or online (e.g. RockAuto.com).

    . Verify that you have enough fuel in the gas tank.

    . Ensure all connections are tight. Only use a flare wrench, to ensure connectors don't get distorted.

    . Check the condition of the fuel supply line--no kinks or distortions.

    . Ensure the fuel tank vents properly.
    N0help4u's Avatar
    N0help4u Posts: 19,823, Reputation: 2035
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    #4

    Aug 17, 2013, 01:23 PM
    He said he would do that if the pump wasn't cranking at all but it cranks fine. He can't figure out how to make it get more than an average of 4 to 5 lbs pressure.
    N0help4u's Avatar
    N0help4u Posts: 19,823, Reputation: 2035
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    #5

    Aug 24, 2013, 02:36 PM
    Thank you all it is finally starting to sound a little better but still cutting out like the idle is low.
    So far we found a ground wire that was loose in the back near the tank.
    Handyman2007's Avatar
    Handyman2007 Posts: 988, Reputation: 73
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    #6

    Aug 25, 2013, 03:48 PM
    9 fuel pumps. You wasted so much time. If you run the pump with the fuel line disconnected from the pressure regulator(Into a large can) does the fuel come out with a lot of pressure? Your fuel rail could [possibly be clogged. Just a guess. The idle is low? Do you have a service engine light on?
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