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Thread: Fuel pressure wont hold need some help

  1. #11
    Join Date
    Jan 2011
    Location
    Duluth Minnesnowta
    Posts
    147
    Mine was losing pressure key off to mine ended up being the regulator I am using a stock one.

  2. #12
    Join Date
    Mar 2013
    Location
    Edmonton, AB, Canada
    Posts
    133
    There was a slow leak at the bottom of the fuel pump hose. I threw on a smaller gear clamp and its holding pressure now. Thanks for all the help everyone
    Back Alley Motorsports 98 GMC
    -5.3l LM7 bored to 5.7l Thompson Motorsports -72mm T4 Magnum Turbo
    -TU1 Custom Grind cam(spec speed.inc) -799 heads
    -.660" Trick Flow dual valve springs -Forged Probe Pistons 3.902" flat top

  3. #13
    Join Date
    Mar 2013
    Location
    Long Beach California
    Posts
    637
    damit. that means ill be dropping my tank too. lol glad you got it fixed. screw those plastic clamps!!!
    Like Tumbler in "Gone in 60" I'll drive anything with wheels or without

    My 95 ECSB LQ9 build thread - http://www.ls1truck.com/forums/lsx-t...to-95-obs.html
    CALI LEGAL ENGINE SWAP!
    Stock 03 LQ9, DBW, 95' 4l80e w/ Transgo shift kit, 2010 50# GM injectors, 2800 Circle D stall, Spectre CAI, Upgraded trans cooler, Home-made E-fans/shroud, Dual EP-381 fuel pumps w/Home-made hotwire kit
    NEXT ON LIST: Dual Battery setup, CAM/Valvetrain upgrade, Build my own rear mount turbo, TRU-TRAC, HIT THE STRIP!!!

  4. #14
    Join Date
    Mar 2013
    Location
    Edmonton, AB, Canada
    Posts
    133
    I just pop the box off rather than dropping the tank. 8 bolts and a couple wires and a few extra hands lol.
    Still drops pressure but extremely slow, stops around 20psi though. I have both clamps as tight as they will go so i dunno where the pressure drop is coming from. I'm gonna cut a small door in the box just in-case i run into more issues with the fuel pump.
    Back Alley Motorsports 98 GMC
    -5.3l LM7 bored to 5.7l Thompson Motorsports -72mm T4 Magnum Turbo
    -TU1 Custom Grind cam(spec speed.inc) -799 heads
    -.660" Trick Flow dual valve springs -Forged Probe Pistons 3.902" flat top

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