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Thread: fuel pressure dropping

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  1. #1
    Join Date
    Jan 2009
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    Quote Originally Posted by dropem View Post
    I will almost guarantee you the fuel line in the tank from the pump to the sender unit have a split. Some of the fuel pump kits come with some fuel line that is not rated to be submersed. I personally have helped fixed 3 different trucks that did not have a submersible fuel hose in the tank. One we replaced them with submersible fuel hose and high pressure fuel hose clamp never had any problems.

    Where can i buy submeresible fuel hose?
    07classic



    !MY GARAGE!

  2. #2
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    Napa
    Slowest in Oklahoma...

  3. #3
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    O'reilly's also sells it. If it is submersible it will say it on the hose, if it does not it is not submersible.

    Junkyard 5.3 milled heads 200 shot, built 4l80e with circle D 4000 multi disc converter
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  4. #4
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    Dec 2011
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    Savannah, ga
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    i found it on oreillys site, does anyone know of the top of their head what size that hose is? i'ld like to have it already rather then have to stop and go get it when i get the bed off lol.


    http://www.oreillyauto.com/site/c/de...se+-+fuel+hose

    i guess the line in tank makes sense since before i had a stock pump and an inline booster pump, so when i installed the walbro i removed the booster pump the line in the tank couldnt handle the entire load and revealed the leak. i just hope thats all it it lol.
    1997 RCSB, AES 390 + 4L80E transplant, F1A Procharger, #160 injectors, Magnafuel 750, Schoenfield Longtubes, 3" flowmasters, Steve Morris Bullit cam, Circle D 3k stall, Ford 9" rear, Homemade Caltrac bars.


  5. #5
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    well so much for oreillys they have to order it for $25 a foot and then it takes 5-7 business days and $7 freight.

    i did have some luck though i remembered seeing a white plastic hose that came with the walbro and i'm glad i didnt throw it away.

    isnt this the hose they recommend to use? the one on the right?




    also it came with those crimp type clamps and i have no way to crimp them will the high pressure fuel hose clamps work or regular old worm clamps?
    Last edited by mattc; 09-06-2012 at 06:50 PM.
    1997 RCSB, AES 390 + 4L80E transplant, F1A Procharger, #160 injectors, Magnafuel 750, Schoenfield Longtubes, 3" flowmasters, Steve Morris Bullit cam, Circle D 3k stall, Ford 9" rear, Homemade Caltrac bars.


  6. #6
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    i guess these clamps should hold? ive never tried this plastic hose and i dont wanna put it all together and find out i still have pressure drop!

    1997 RCSB, AES 390 + 4L80E transplant, F1A Procharger, #160 injectors, Magnafuel 750, Schoenfield Longtubes, 3" flowmasters, Steve Morris Bullit cam, Circle D 3k stall, Ford 9" rear, Homemade Caltrac bars.


  7. #7
    Join Date
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    Location
    Savannah, ga
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    well i tried the hard plastic line that came with the pump and its leaking just as bad if not worse then before. so i called napa and got them to order me some 1/4" submersible fuel hose.

    also i tried unplugging the vacume line to the fuel pressure regulator and the pressure drop wasnt as bad but it was still there. i checked out some youtube videos and it says that a bad regulator will leak out of the vacume port but i left it running for 2-3 minutes and never saw anything leaking. the regulator came off of a stock truck and it was run tested, it did sit dry on the shelf for a while before i got the motor all back together could it have dry rotted and went bad? is there another way to test it to see?
    1997 RCSB, AES 390 + 4L80E transplant, F1A Procharger, #160 injectors, Magnafuel 750, Schoenfield Longtubes, 3" flowmasters, Steve Morris Bullit cam, Circle D 3k stall, Ford 9" rear, Homemade Caltrac bars.


  8. #8
    Join Date
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    New Orleans
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    I think i might just buy it online. is it really 1/4''? i thought it was like 3/8"
    07classic



    !MY GARAGE!

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