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fuel pump question

This is a discussion on fuel pump question within the General Help forums, part of the LSx Technical Help Section category; my car is not getting full acceleration the mechanics said it is the fuel pump but they want a lot ...

  1. #1
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    fuel pump question

    my car is not getting full acceleration the mechanics said it is the fuel pump but they want a lot of money to fix it. is this a hard job to do
    and how can you tell if its the fuel pump or the filter that is causing this it only hessitates only when i hit the gas like from a start
    Last edited by ajonesz28; 04-21-2009 at 03:58 PM.

  2. #2
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    1998 Z-28 Coupe

    The pump is not hard to replace. It sounds like it is the fuel filter that is gummed up. Best thing to do is replace the fuel filter and see what happens. If it continues then I would change the fuel pump.

  3. #3
    Senior Member tatertot91's Avatar
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    Sunset Orange Metalic
    2001 Camaro SS

    If you have to replace the fuel pump the best way i know to do it is to pull back the carpet in the trunk and find the sheet metal right above the fuel tank.

    Now start cutting.


    This is where to cut
    http://www.worldisround.com/articles/12533/photo14.html

    Then remove the pump and get the new one put in.
    Simple once you know what to do.
    My friend had to do it in his car and once he had it cut it wasn't that big of a problem.

  4. #4
    Dealing Powder ntimid8r7's Avatar
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    1994 Z28 MQBM
    2001 SS #1629 LPM

    ^^^Those measurements are not correct for later 4th gens. Let me find my pics and you can go from that. Those look like they are from a 3rd gen.
    Last edited by ntimid8r7; 04-21-2009 at 07:46 PM.
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  5. #5
    Dealing Powder ntimid8r7's Avatar
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    1994 Z28 MQBM
    2001 SS #1629 LPM

    Here you go... Just be careful and not go too deep on the cut as there are lines and harness. You can see where they are. There may be a tool to remove the lock ring but I used a hammer and a chisel and it woked just fine. All it does is slide under the black tabs.





    Last edited by ntimid8r7; 04-21-2009 at 07:44 PM.

  6. #6
    Single Malt rbob93's Avatar
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    ^ Nice clean cut......how'd you cut it??

  7. #7
    Veteran 0rion's Avatar
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    the first thing I would do is get a second opinion.

  8. #8
    Dealing Powder ntimid8r7's Avatar
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    1994 Z28 MQBM
    2001 SS #1629 LPM

    Quote Originally Posted by rbob93 View Post
    ^ Nice clean cut......how'd you cut it??
    A Dremel and the quick lock metal cutting wheels.

  9. #9
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    1998 Trans Am -Oynx Black

    Hook up the pressure gauge and see if you are getting 55-60 psi at WOT.

    If you are then its not the fuel pump.

    When is the last time you did a tuneup? Plugs wires pcv change maf cleaning etc?

  10. #10
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    i just got the car for cheap and it does need a tune up it was only at 20psi but i wanna know if is it the filter or pump im going to put the filter on first and see if it works better

  11. #11
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    how do you change the fuel pump without cutting anything

  12. #12
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Drop the tank.

  13. #13
    Military Muscle :usa: MYSCZ06's Avatar
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    not fun to do either...

  14. #14
    Dealing Powder ntimid8r7's Avatar
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    1994 Z28 MQBM
    2001 SS #1629 LPM

    involves dropping the rear. easier to cut.

  15. #15
    Senior Member tatertot91's Avatar
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    Sunset Orange Metalic
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    Quote Originally Posted by ntimid8r7 View Post
    Here you go... Just be careful and not go too deep on the cut as there are lines and harness. You can see where they are. There may be a tool to remove the lock ring but I used a hammer and a chisel and it woked just fine. All it does is slide under the black tabs.

    Click for full size

    Click for full size

    Click for full size
    good call

  16. #16
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    Quote Originally Posted by ntimid8r7 View Post
    involves dropping the rear. easier to cut.
    You don't have to drop the rear.

  17. #17
    Dealing Powder ntimid8r7's Avatar
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    1994 Z28 MQBM
    2001 SS #1629 LPM

    It may not have to come completely out but having it up high enough to get the tank out is a problem for some folks.

  18. #18
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    2000 Grand Prix GTP
    2000 Trans Am WS6 M6

    Quote Originally Posted by ntimid8r7 View Post
    It may not have to come completely out but having it up high enough to get the tank out is a problem for some folks.
    Yeah, just jack it high enough for the rear to drop on the suspension and be up in the air.

  19. #19
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    I'd drop the tank before I'd cut my car up. Just my opinion though.
    :\Users\Steven\Pictures\d6ftg5nh.gif


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  20. #20
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    1998 Pontiac Trans AM

    Looks good but i think there are differences in the 4th gen between fuel pumps. My sending unit on my 98 has the extended lines, unlike the 2nd post where they just disconnect right there.

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