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Thread: 98 Trans Am Fuel Pump Replacement (how to)

  1. #1
    Join Date
    Feb 2011
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    Gassaway, WV
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    37

    Default 98 Trans Am Fuel Pump Replacement (how to)

    Thank you for all of your helpful suggestions. After carefully considering the idea of cutting my trunk, I dropped the rear instead. My TA is a 98 Vert, which left me with a few issues. Non-verts have a nice hatch for a trunk; the trunk lid can be opened up allowing for plenty of room to extract the pump. The verts have a flat trunk lid and a support dam that goes between the trunk and the top. This allows the height of 8 inches fit cutting tools (which is easily done) but, it also only leaves 8 inches of height to remove the fuel pump assemble (not so easily done in that short of a space). Also, (not sure if it is on all 4th gens) the neck on the fuel pump assemble are about 10 inches long and at the tip turn and travel another 4 inches to the left (this would make for one funky hole in the trunk).

    Dropping the rear end of the car was not that big of an issue:

    Remove rear tires, suspension, and muffler:
    563461_3485185695548_1448560609_33168144_84541935_n.jpg

    Unplug Fuel System:
    552862_3485186655572_1448560609_33168145_1340896821_n.jpg

    Drop rear, remove tank:
    373973_3485188535619_1448560609_33168147_1910590020_n.jpg

    Wire up new Walbro 255LPH Pump:
    548671_3485190015656_1448560609_33168149_1017820788_n.jpg

    Make sure pump is secure:
    561975_3485189335639_1448560609_33168148_280440666_n.jpg

    Installation is opposite of removal!

    Prime pump about 5 clicks, start car, and you are good to go.

    The issues I saw with this project were time and patience. The suspension was replaced last year, so removing it was a snap. Fuel System just unplugs. If you have a welded muffler system, it will need removed. I have a Borla exhaust and we were able to unbolt it and slip it off. The exhaust system was a little stubborn, but it came out fine. The neck to the fuel tank is welded on. Dropping the tank was one of the most complicated parts of the project, but after trial and error the tank dropped. Here is a very important tip: when you are removing your fuel pump assembly, rotate the fuel pump assemble about 15 minutes clock wise; This will allow the float to clear the splash card inside of your fuel tank (install opposite of removal)! Putting the tank back up is just as tricky as taking it down, more trial and error. After the tank was back in place it was nothing more than lifting everything back into place, bolting it back up, and giving it a test fire.

    Thanks again for all of your helpful suggestions.
    Last edited by chrislr; 03-22-2012 at 02:08 AM.

  2. #2
    Join Date
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    Default Re: 98 Trans Am Fuel Pump Replacement?

    Good to see you finally got it done and also good to see you back on the site. Daniel told me it only took you all 45 min to do all that...LOL.

    Sig by RogerStout

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  3. #3
    Join Date
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    Default

    That's great congrats on finally gettinng it done.....


    Kenny thTa hilarious !
    2001 Corvette - Heads, Cam, Intake, Full exhaust, Hotchkiss Swaybars, z06 brake ducts, SS brake pistons & Lines Etc. Lowered & Murdered out.
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  4. #4
    Join Date
    Feb 2011
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    Gassaway, WV
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    37

    Default Re: 98 Trans Am Fuel Pump Replacement?

    Quote Originally Posted by kennygene View Post
    Good to see you finally got it done and also good to see you back on the site. Daniel told me it only took you all 45 min to do all that...LOL.
    LOL, Yeah! We were going to photo shop an Easy Button to the side of the tank with a hydraulic arm and say it only took 45 minutes. ;-) Truthfully though, if you go into it knowing what you are getting into it isn't bad. The top 3 most complicates parts of the drop was; 1) Getting the muffler off, 2) Getting the Tank Out, and 3) Getting the Tank back in. I read where people did it by themselves, but to make life a lot easier; get help. To get the tank in, it took three people, one pushing, one twisting, and one working on the tank neck. In all, it was a fun and educational project. I myself am truly glad it is done.
    Last edited by chrislr; 03-22-2012 at 12:34 PM.

  5. #5
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    Default Re: 98 Trans Am Fuel Pump Replacement?

    Quote Originally Posted by chrislr View Post
    Quote Originally Posted by kennygene View Post
    Good to see you finally got it done and also good to see you back on the site. Daniel told me it only took you all 45 min to do all that...LOL.
    LOL, Yeah! We were going to photo shop an Easy Button to the side of the tank with a hydraulic arm and say it only took 45 minutes. ;-) Truthfully though, if you go into it knowing what you are getting into it isn't bad. The top 3 most complicates parts of the drop was; 1) Getting the muffler off, 2) Getting the Tank Out, and 3) Getting the Tank back in. I read where people did it by themselves, but to make life a lot easier; get help. To get the tank it it took three people, one pushing, one twisting, and one working on the tank neck. In all, it was a fun and educational project. I myself am truly glad it is done.
    I figure it took 45 minutes to get the exhaust and suspension out of the way...LOL

    Sig by RogerStout

    www.bullplayztrading.com

    2004 SRT 10 Red RC Skanky~Hott Car Club President
    #2402 out of 3057, Built 6/4/2004
    Dyno####433/469 at the wheels!!!
    Mopar Nationals 2010 Viper Truck Show Winner
    Mopar Nationals 2011 Viper Truck Show 2nd Place
    Mopar Nationals 2012 No Show
    Mopar Nationals 2013 Viper Truck Show Winner

  6. #6
    Join Date
    May 2010
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    Sutton
    Posts
    640

    Default Re: 98 Trans Am Fuel Pump Replacement?

    Nice, glad you did it right. I just got my pump for our vert last thursday. Gonna have to get it in soon. Going the same route, dropping the rear. Gonna replace all the suspension parts while I am in there though.



    2003 Bagged S10
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  7. #7
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    Mar 2008
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    Default Re: 98 Trans Am Fuel Pump Replacement?

    Good job man. Definitely a nice writeup.



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  8. #8
    Join Date
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    Default

    As we all know, fuel pumps only go bad when you have a full tank of gas lol
    - I break things -
    '70 Mach-1 "money pit"

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