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running new lines for fuel pump

This is a discussion on running new lines for fuel pump within the GTO forums, part of the Vehicle Specific category; ok, ive got a gremlin somewhere, the primary pumps isnt priming, i hear it running, but nothing builds on the ...

  1. #1
    Member JAX04's Avatar
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    PBM 366ci TC78 E85
    2004 Pontiac GTO PBM A4

    running new lines for fuel pump (electrical)

    ok, ive got a gremlin somewhere, the primary pumps isnt priming, i hear it running, but nothing builds on the gauge, the secondary pump builds pressure to the moon, had to dial back the regulator for awhile. set it at about 58-59 psi base pressure. pretty close to stock i believe.

    Ok, now, i noticed that the secondary pump when i manually turn it on, it sounds a bit louder then the primary, which is weird considering they are both walbro gss340 255lph pumps. same pumps. one is brand new, and the primary maybe has 500 miles on it, if that, so they cant be that out of whack.

    only difference between this that the secondary is on its own wiring ran off a hobbs switch and about 2' from the battery, i believe i used 10g wire for it.

    so, if ran NEW 10g wires in the same fashion that i ran the wires for my rearmount oil pump, using the small purple wire as the signal wire for the relay, it would act just like factory, correct?? I figure it would be a good idea to do this while im in there anyway, as long as it works like i think it should...

    any thoughts????
    Last edited by JAX04; 03-11-2011 at 07:47 AM.

  2. #2
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    those pumps use a bucket?

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    Member JAX04's Avatar
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    PBM 366ci TC78 E85
    2004 Pontiac GTO PBM A4

    no bucket, intank walbro 255s. They are clamped to the side of the bucket. but there is not bucket to speak of now, lol

  4. #4
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    are you still using the accordian type tubing on the pump or did you replace it with fuel hose? Did this just start up out of the blue or did it start after you hooked the second one up? I've seen that accordian crap split and crack and most places will sell you 30R9 hose as in tank hose. Local guy's GTO had that problem. If for some reason that ends up being your issue there is a special in tank hose you have to use that doesn't break down in gasoline....kinda pricey. Napa carries it I believe and its 30R10 hose.

  5. #5
    Member JAX04's Avatar
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    PBM 366ci TC78 E85
    2004 Pontiac GTO PBM A4

    orion,

    this happened since i made a new fuel system, the car ran fine a week ago when i made the video, but since, i added fuel rails, reg and full return and went to twin intank walbros Y'd together into a -8 bulk head. i would think it impossible to have something backwards since the pump that is having issues is running off the stock wiring.

    all i did was plug it into the walbro and hang it in the tank. very weird.

    I can rule out wiring backwards for that reason and the fact that when i turn it on, it doesnt pull the pressure down. pressure stays the same and i can hear the walbro running, just nothing is happening.

  6. #6
    Member JAX04's Avatar
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    PBM 366ci TC78 E85
    2004 Pontiac GTO PBM A4

    problem solved. Walbros are going like crazy on command

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