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  1. #1

    "jumpy" fuel gauge

    Hey guys and gals, I'm new on here and I have a question for you. My fuel gauge has been acting up lately and has been going up and down a lot. I have no idea what the problem is. The car could be on a perfectly flat surface and go all the way down and the low fuel message comes up on the display. I thought I'd ask you W body guys since I am not as knowledgeable on Ws. I could probably search but I am too lazy.

    Any input is greatly appreciated before I try strolling down to the dealer and chucking my money down the toilet for them to just "take a look at it".

    Forgot to mention I have an 01 Impala LS w/L36
    01 Impala LS L36
    <br />
    <br />Stock 3800-fixed recall TB Fuel crap

  2. #2
    terryk2003's Avatar
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    "jumpy" fuel gauge

    first thing that comes to my mind is a bad ground to the sending unit...but, i'm not positive on that...i'm sure someone else will chime in later that might know a little more...
    -Terry K.

    '03 Grand Prix GTP -
    A Couple Mods - 240WHP 333WTQ - SOLD
    '14 Chevy Cruze RS 1.4T - Mine
    '14 Chevy Sonic LT Hatch 1.4T - Wife's


  3. #3

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    "jumpy" fuel gauge

    Is the needle jumping around? You need a new fuel level sender.
    -2007 Saturn Sky Redline M5<br />-2007 Chevrolet Silverado Classic 2500HD 6.0/A4<br />-2006 Chevrolet Impala SS<br />-1996 Chevrolet Camaro Z28 Hardtop M6<br />-1996 Chevrolet Beretta 3400<br />-ASE Master Technician with ASE Advanced Engine Performance and Under Car Certification

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    "jumpy" fuel gauge

    before you go that far, check the conector near the fuel tank. take it apart and make sure there is no crap in there and its not loose. given the age of your car i would look for production type mistakes before worn or bad parts
    2003 Monte LS, skifi2 xm, clarion music catcher, stock amp for upgraded front and rear deck speakers, california mono sub amp for 2 kenwood 10in subs in Q-logic box<br />

  5. #5

    "jumpy" fuel gauge

    Thanks for the info.
    01 Impala LS L36
    <br />
    <br />Stock 3800-fixed recall TB Fuel crap

  6. #6
    Anonymous
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    "jumpy" fuel gauge

    Mine goes up and down all the time... I go from having half a tank to a low fuel light, than back up to 1/4 tank in seconds...

  7. #7

    "jumpy" fuel gauge

    Yeah, the fuel gauge on my Bonnie jumps around alot to, the GTP is great though.


    Aaron
    1998 GTP- 3800 SII Supercharged @ 50k<br />1997 Chevy Cav Z24- LD9 2.4L DOHC @ 85k<br />2007 Ford Fusion SEL AWD- 3.0L DOHC @ 4k

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    "jumpy" fuel gauge

    Quote Originally Posted by JW
    before you go that far, check the conector near the fuel tank. take it apart and make sure there is no crap in there and its not loose. given the age of your car i would look for production type mistakes before worn or bad parts
    On a four year old car? Production screw ups happen in the first 5k miles.

    If your car came into work.....and the gauge moved around.....I would put a fuel level sender in it.
    -2007 Saturn Sky Redline M5<br />-2007 Chevrolet Silverado Classic 2500HD 6.0/A4<br />-2006 Chevrolet Impala SS<br />-1996 Chevrolet Camaro Z28 Hardtop M6<br />-1996 Chevrolet Beretta 3400<br />-ASE Master Technician with ASE Advanced Engine Performance and Under Car Certification

  9. #9
    terryk2003's Avatar
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    "jumpy" fuel gauge

    Quote Originally Posted by Canada
    Quote Originally Posted by JW
    before you go that far, check the conector near the fuel tank. take it apart and make sure there is no crap in there and its not loose. given the age of your car i would look for production type mistakes before worn or bad parts
    On a four year old car? Production screw ups happen in the first 5k miles.

    If your car came into work.....and the gauge moved around.....I would put a fuel level sender in it.
    you must work for a dealership?... ...am i right!?...
    -Terry K.

    '03 Grand Prix GTP -
    A Couple Mods - 240WHP 333WTQ - SOLD
    '14 Chevy Cruze RS 1.4T - Mine
    '14 Chevy Sonic LT Hatch 1.4T - Wife's


  10. #10

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    "jumpy" fuel gauge

    Yeah........I've seen it enough times to ensure that its the problem.

    As long as the problem is indeed described as I make it out to be. I'd have to see it to be sure.

    The reason I am so sure of myself...is, well, I know how the system works. The float in the tank is attached to a set of fingers that ride along a big resistor type strip. The fingers wear off....causing the voltage being sent to vary.......causing the gauge to jump around like it does.

    The only way to be sure of this is to pull the fuel tank down, pull the pump out and look at the sender.

    You might be trying to accuse me of shotgunning parts. Thats fine.

    But whats it pay to do that? I only get 1 hour for diagnosis. I'd like to remove the fuel pump and check it out.....but what if the customer doesn't want to buy the level sender after all that work? I just went though all the effort of removing a fuel tank for 1 hour.
    -2007 Saturn Sky Redline M5<br />-2007 Chevrolet Silverado Classic 2500HD 6.0/A4<br />-2006 Chevrolet Impala SS<br />-1996 Chevrolet Camaro Z28 Hardtop M6<br />-1996 Chevrolet Beretta 3400<br />-ASE Master Technician with ASE Advanced Engine Performance and Under Car Certification

  11. #11

    "jumpy" fuel gauge

    i bet your from pennsilvania..

    they put stuff in the gass that eats away the fuel gauge in the tank

    i dont know much about it or if it was only limited to pennsilvania
    1995 lumina LS 3.4DOHC 198k miles - retired!<br />Coming Soon- 1995 Crate motor hooked to a reman 3.73 FDR 4t60e with stalls and HD-upgrade. Adding headers non-hackjob. I love my friends! Scott you ROCK!<br />&nbsp; http://memimage.cardomain.net/member_images/4/web/436000-436999/436966_123.jpg<br />**Signature Pic Removed*<br />*MAXIMUM SIG PHOTO SIZE 600 X 150 *<br />http://www.w-body.com/forum/index.php/topic,60683.0.html

  12. #12

    "jumpy" fuel gauge

    So.. can I do any work myself? Or am I better off having somebody do it for me.
    01 Impala LS L36
    <br />
    <br />Stock 3800-fixed recall TB Fuel crap

  13. #13

    "jumpy" fuel gauge

    Its spelled Pennsylvania. As yes, GM put a new fuel sensor in my 2003 Bonnie when I had it because of the "bad gas" that went around for awhile.


    Aaron
    1998 GTP- 3800 SII Supercharged @ 50k<br />1997 Chevy Cav Z24- LD9 2.4L DOHC @ 85k<br />2007 Ford Fusion SEL AWD- 3.0L DOHC @ 4k

  14. #14
    Forum Moderator runt's Avatar
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    "jumpy" fuel gauge

    I believe that the "bad gas" is done with here in Penciltucky.
    1996 Olds Cutlass Supreme SL - 119k
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    2007 Pontiac Grand Prix GT

  15. #15
    Euro's Avatar
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    "jumpy" fuel gauge

    at least your problem you can fix, on most of our cars, if the gas guage gets anywhere from empty to a half a tank, the needle moves around so much when I turn, accelerate, or decelerate I cant tell how much gas I have.
    -Matt
    2000 Regal GS - 165k - 4" K&N, 3" OR D/P, Borla Pro-XS, AL104's
    2009 Impala LT - 44k - Wife's new DD
    2000 Grand Prix GT - 96k - L26, CAI -
    SOLD 4/9/11
    1994 Lumina Euro - 138k - Z34 grille, Monte Z34 16's, odds 'n' ends, Super Chevy award winner - SOLD 4/18/07

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