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  1. #1

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    Fuel Gauge Keeps Moving

    I just recently bought a 95 vert, 3.4L. The fuel gauge seems to "float." When accelerating it goes up, when idling it moves back down. I can't seem to get it to sit still. Anyone have this issue? Could my sending unit be bad? Could I have a leak somewhere? I can't seem to get an accurate reading - though it does progressively move towards E - it still pops back up upon acceleration. Thank you for any help.

  2. #2
    mra32's Avatar
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    Re: Fuel Gauge Keeps Moving

    yeah. Its an easter egg of GM's engineering department. Not only is it a fuel gauge, its an accellerometer too!

    Mine does that. And whoever says it sucks is lying, they just wish their dashboard was as animated as ours are.
    Mike A. ...knows and loves Nunzi...

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  3. #3
    Forum Moderator digitaloutsider's Avatar
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    Re: Fuel Gauge Keeps Moving

    It's normal.
    2006 Nissan Altima SE-R 3.5L 214ci VQ35DE DOHC 60 V6 | 6MT
    Raclingline HFPCs and Y-pipe, NWP VIAS delete, Goodridge SS brake lines, removed airbox snorkel, deburgered.

    1998 Jeep Grand Cherokee 5.9 Limited 5.9L 360ci Magnum Pushrod 90 V8 | 46RE | NV249
    Flowmaster 50 SUV muffler, 180 t-stat, CAI, does sick burnouts.

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  4. #4
    RobertISaar's Avatar
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    Re: Fuel Gauge Keeps Moving

    Quote Originally Posted by digitaloutsider
    It's normal.
    "normal"
    King of Code
    1995 Monte Carlo LS 3100, 4T60E... for now, future plans include driving it until the wheels fall off!



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    Forum Moderator digitaloutsider's Avatar
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    Re: Fuel Gauge Keeps Moving

    Normal for our shitboxes*

    There.
    2006 Nissan Altima SE-R 3.5L 214ci VQ35DE DOHC 60 V6 | 6MT
    Raclingline HFPCs and Y-pipe, NWP VIAS delete, Goodridge SS brake lines, removed airbox snorkel, deburgered.

    1998 Jeep Grand Cherokee 5.9 Limited 5.9L 360ci Magnum Pushrod 90 V8 | 46RE | NV249
    Flowmaster 50 SUV muffler, 180 t-stat, CAI, does sick burnouts.

    1994 Ford Thunderbird SC Supercharged Intercooled 3.8L 231ci Pushrod 90 V6 | M5R2
    180 t-stat, intake, ASP UDPs, 10% S/C pulley.

  6. #6
    Forum Moderator GP1138's Avatar
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    Re: Fuel Gauge Keeps Moving

    Quote Originally Posted by djrobnyc
    When accelerating it goes up, when idling it moves back down.
    This is an analogy to what your peen should be doing as you hit the gas!
    John C. Wallace

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  7. #7
    Night Fury's Avatar
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    Re: Fuel Gauge Keeps Moving

    Quote Originally Posted by ShootR138
    Quote Originally Posted by djrobnyc
    When accelerating it goes up, when idling it moves back down.
    This is an analogy to what your peen should be doing as you hit the gas!
    Haha, win!
    -Buck W.
    ****1996 Chevrolet Silverado Z71, 4x4 5.7 V8, auto, 167,000 miles****

    ****1988 Pontiac Grand Prix SE, 2.8 V6, 5-speed 282, 282,000 miles****


    ^^^Bi-polar bitch. The epitome of the phrase "A GM will run poorly longer than most cars run at all"

  8. #8
    Lurker Penglii's Avatar
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    Re: Fuel Gauge Keeps Moving

    Quote Originally Posted by ShootR138
    Quote Originally Posted by djrobnyc
    When accelerating it goes up, when idling it moves back down.
    This is an analogy to what your peen should be doing as you hit the gas!
    Truer words have never been typed! LOL!

    What do the other auto manufacturers do differently that allows their fuel level sensors to be more accurate?

    Quote Originally Posted by RobertISaar View Post
    in a W, sometimes, it's easier to pull the engine than it is to pull the battery.

  9. #9
    Addicted to eaton's Avatar
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    Re: Fuel Gauge Keeps Moving

    same thing gm did in 1997 up.
    2010 Chevy Silverado 325 5.3L Vortec Z71 Crew Cab DD
    2002 Grand Prix GTP. 40th Anv edition, 3.8L Supercharged V6, 130$ BBQ special. 111,000k
    1999 Chevy Silverado 350 5.7L vortec z71, 299k miles, Built 350 Built 4l60E slow wip
    1997 Grand Prix GTP, 3.8L supercharged V6 -Knocking motor mod. 189,000k
    1995 BMW 325I Slow, old, and high tech.

  10. #10
    Guy Incognito WhatTheFehl's Avatar
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    Re: Fuel Gauge Keeps Moving

    My gas tank is over full.. until I get to a half tank, then I have a quarter
    Mike F

    1999 Pontiac Grand Prix GTP - 196,000 miles, SD headers, FWI, Toy/Money Pit
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  11. #11
    Euro's Avatar
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    Re: Fuel Gauge Keeps Moving

    Quote Originally Posted by Addicted To Eaton
    same thing gm did in 1997 up.
    I've never seen a 2nd Gen do this.
    -Matt
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  12. #12
    Addicted to eaton's Avatar
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    Re: Fuel Gauge Keeps Moving

    thats what i was saying lol. Look at the question right above my post. Sorry for the confusion
    2010 Chevy Silverado 325 5.3L Vortec Z71 Crew Cab DD
    2002 Grand Prix GTP. 40th Anv edition, 3.8L Supercharged V6, 130$ BBQ special. 111,000k
    1999 Chevy Silverado 350 5.7L vortec z71, 299k miles, Built 350 Built 4l60E slow wip
    1997 Grand Prix GTP, 3.8L supercharged V6 -Knocking motor mod. 189,000k
    1995 BMW 325I Slow, old, and high tech.

  13. #13
    1990lumina's Avatar
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    Re: Fuel Gauge Keeps Moving

    I know on Suzukis the guage is controlled by the BCM. In "normal" mode the guage will go from F to E in 55minutes - so the level bouncing around has no effect on the guage. There is a small flaw though if people refuel with the key on the guage will still be in "normal" mode and the guage will go from E to F in 55mins lol..we've had people come in saying they filled up and the guage is stuck at E but it will go eventually to F.
    Jeff L. :: 2nd Canadian to win COTM The Preservation for POS W-bodies Canada Chapter
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  14. #14
    RobertISaar's Avatar
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    Re: Fuel Gauge Keeps Moving

    Quote Originally Posted by 1990lumina
    I know on Suzukis the guage is controlled by the BCM. In "normal" mode the guage will go from F to E in 55minutes - so the level bouncing around has no effect on the guage. There is a small flaw though if people refuel with the key on the guage will still be in "normal" mode and the guage will go from E to F in 55mins lol..we've had people come in saying they filled up and the guage is stuck at E but it will go eventually to F.
    sounds like my mom's F150... she filled it up once with it running and it still was on E when she was done... freaked her out for a few minutes.
    King of Code
    1995 Monte Carlo LS 3100, 4T60E... for now, future plans include driving it until the wheels fall off!



  15. #15
    rockfangd's Avatar
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    Re: Fuel Gauge Keeps Moving

    There is one thing that is possible to cause a float problem.
    If the fuel tank has been changed the new tank may have no baffles, or if it does they are probably not in the same place as the original ones.
    My cutlass never did that until i repllaced my fuel tank
    rockfangd

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