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  1. #1

    Default 2007 uplander fuel system problem: pump has 62 psi at tank, engine won't run.

    Jon b here, Palmdale ca.
    my 2007 uplander ran out of gas. i added 4 gallons to the tank (roadside) and the engine won't start.
    i dropped the gas tank and tested the fuel pump pressure at 62 p.s .i..
    Still won't start, no fuel to the engine.
    I tried to check fuel pressure at the green capped schrader valve but nothing at all comes out when I depress the needle.

    Any suggestions?

  2. #2

    Default

    Welcome to GMTC. Have you checked your feul pump and also have you filled it yet. Also a hint for next time dont run out of gas.
    1994 GMC Yukon, 2 door, Victory Red
    Garage Link: http://www.gmtruckclub.com/forum/sho...1994-GMC-Yukon

  3. #3

    Default

    I have checked the fuel pump at the tank. Specs list required pressure at 56-62 P.S.I..
    Where do I check pressure from at the engine? And it was my wife who ran out of gas.

  4. #4

    Default

    Sorry to hear you're having wife-induced troubles. I can't help with the issue but wanted to welcome you to GMTC!

  5. #5

    Default

    Welcome to the club, it's good to have you aboard.


    2002 Chevrolet Silverado Extended Cab SportSide: See Mods in My Garage

  6. #6

    Default

    Welcome to the G M T C !


    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    ===============
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

  7. #7

    Default

    If you have pressure at the pump, but not at the Schrader valve, that suggests to me either something blocking fuel flow to the engine. I would actually hook your pressure gauge up to the Schrader valve and run the pump to see if the system generates pressure. Have you checked the fuel filter? Kinks or other damage to the supply line?

    The other possibility that comes readily to mind is if the regulator is stuck open. Carefully (so as not to damage the return line) pinch off a soft spot in the return line and run the pump to see if that induces the pressure to come up. If you get no pressure with the return line open, but pressure builds up when the return line is closed, that suggests that the regulator is stuck open (I'm assuming at this point that you '07 still uses the continuously circulating fuel system like my '98).
    '98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
    '92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
    "My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World

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