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Replaced fuel pump and now gage is inop

This is a discussion on Replaced fuel pump and now gage is inop within the General Help forums, part of the LSx Technical Help Section category; I have a 98 ws6 that i replaced the fuel pump on with a new gm pump. After installing it ...

  1. #1
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    1998 TRANS AM

    Replaced fuel pump and now gage is inop

    I have a 98 ws6 that i replaced the fuel pump on with a new gm pump. After installing it my gage quit working. I took it back out and manually moved the float and still nothing. I got another new pumpasm and hooked it up and same thing. Anyone ever heard of this or can give me any ideas? Thanks tom

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    Spaz is My Mentor SMWS6TA's Avatar
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    did you reconnect the wire harness? there are 2 IIRC.

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    Think i have it narrowed down to 2 bad modules. Hooked up the old pump and gage work perfect. Gonna get a new one on tuesday and try it again. Thanks

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    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
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    That sucks when you get "new" stuff it doesn't work....

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    Agreed. Very frustrating. Let us know if this fixes it.

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    Member jb3golf's Avatar
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    1998 Camaro Z28 Conv. M6

    Please be sure to keep us updated on this issue....my 98 Forged 347's fuel Guage has stopped working for a while now and won't change regardless of what module I install. .thanks

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    Smiles for 9.5 Years cammed goat's Avatar
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    "New" stuff and it either doesn't work, or you need another part to GO with the "new" stuff. Know the feeling.

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    Member jb3golf's Avatar
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    1998 Camaro Z28 Conv. M6

    Quote Originally Posted by TRANSWORLD43 View Post
    Think i have it narrowed down to 2 bad modules. Hooked up the old pump and gage work perfect. Gonna get a new one on tuesday and try it again. Thanks
    Actually, it's interesting that we both have the entry year of the LS1 F-body (98') and I'm noticing how more and more of my gauges and little electric gremlins keep popping up...almost 20 years old our cars are! Lol...heck their from the last Century! Lol...

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    Member jb3golf's Avatar
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    Quote Originally Posted by cammed goat View Post
    "New" stuff and it either doesn't work, or you need another part to GO with the "new" stuff. Know the feeling.
    Very true cammed goat! Nice GTO by the way! What color is it? It looks like a dark metallic gray? Very nice. ...

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    I would pop the connector back by the tank, locate the sender wires, and then check the ohm reading to see if you have a legitimate reading or if the circuit is open.

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    Member Pete Rock98's Avatar
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    Quote Originally Posted by TRANSWORLD43 View Post
    Think i have it narrowed down to 2 bad modules. Hooked up the old pump and gage work perfect. Gonna get a new one on tuesday and try it again. Thanks
    Install the old fuel sender onto the new pump just take your time doing it.Did you drop the tank or do the trap door method?
    Last edited by Pete Rock98; 02-22-2015 at 10:59 PM.

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    Member RONS98TA's Avatar
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    I have a 98 TA and replaced my pump with a Racetronics 255lph. Didnt have any issues at all. I did the "trap door" mod though. Just incase I need to access it again it will only be a 20 min job!!
    1998 Pontiac TA, stock heads, FAST 90, FAST 90 TB, FLP LT, off road y-pipe with cat delete, flow master muffler, comp cams 54-457-11 223/231-610/617-112 LSA, Pro charger D1SC with FMIC @ 8psi, FROST tune, VIG 3200 stall, built 4l60e, snow meth kit, MOSER 12 bolt 373 gears, Derale 13900 trans cooler.

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    Although I swore I would never cut a hole in our car, when it came time to replace the fuel pump I also went with the trap door. I'm glad I did as I then had some issues with the fuel pressure regulator after the fact and ended up pulling the pump 4-5 more times to get it all straightened out.

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    Member Pete Rock98's Avatar
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    What happens there are little fingers on the sender and the 98 have a metal tank with baffels inside you have to install the pump just at the right angle or the float hits the side and damages the sender.

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    Smiles for 9.5 Years cammed goat's Avatar
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    Quote Originally Posted by jb3golf View Post
    Very true cammed goat! Nice GTO by the way! What color is it? It looks like a dark metallic gray? Very nice. ...
    Haha. Thanks. Phantom Black with carbon fiber hood and carbon fiber spoiler.

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