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98 trans am no power

This is a discussion on 98 trans am no power within the General Help forums, part of the LSx Technical Help Section category; hi guys, my car has been acting up for awhile now and im gettin really pissed. The car seems to ...

  1. #1
    Junior Member red98ta's Avatar
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    RED
    1998 Trans Am

    Angry 98 trans am no power

    hi guys, my car has been acting up for awhile now and im gettin really pissed. The car seems to hove no power, from take off or driving 60 and punching it is a turd. just did plugs and wires not that long ago, just installed new slp mass air sensor, bout to put on slp loudmouth. i dont know what to do any more. the car is just slow it seems like a v6. any ideas? thanks

  2. #2
    Member red00bird's Avatar
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    red
    2000 trans am

    Take the maf sensor off put the stock one back on then try it
    Polluter,410 gears,ls6 intake,pacesetter long tubes ,tsp true duals,slp pulley,slp lid,stock pp throttle body,strano springs n sway bars,founders performance stb,Lca's and Lca relocation brackets,adjustable phb and phb relocation bracket,umi 3point sfc's ,diamond stg2 clutch,koni 4/3s,mgw shifter

  3. #3
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    First off welcome to the site and it's great to have another fellow 98 in the club house.


    SLP MAF is the problem - there have been many reported issues using aftermarket MAFs. The stock one is actually a great one, good for up to around 500 hp cars. I don't hate all SLP products but the MAF is a known issue.


    Do you have a stock MAF or know a buddy that will let you use his just for a test?


    One more way to help determine is disconnect the wire harness at the MAF, let it run on the defualt density tune. See of it helps or makes it run worse.


    Also I don't see mention but are you running a K&N filter or something like it?

  4. #4
    Member godless-phoenix's Avatar
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    Blackened fire chicken
    2000 Pontiac Trans Am WS6

    maybe your transmission is going out? any more details on how your car is driving and any other mods youve done would help...

  5. #5
    Junior Member red98ta's Avatar
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    RED
    1998 Trans Am

    i do have the k&n filter the one that is wide open, no other mods have been done. i just dont understand why there are is no power. my buddy has a 2000 camaro and it has high miles and it screams. im stumped

  6. #6
    Member chris1974's Avatar
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    Bright Red
    1998 Firebird Formula LS1

    Welcome Red. I have a 98 also. How many miles are on her? How was she running prior to installing the SLP? You say it's been acting up for a whille now- do you remember when it started?

  7. #7
    Junior Member red98ta's Avatar
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    RED
    1998 Trans Am

    thanks, 139,XXX mi ive had the car for 5 years, and it hasnt been right for a while say a couple years. just thought it was a bad mas air sensor or just needed a tune up, but not the case.

  8. #8
    Member chris1974's Avatar
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    Bright Red
    1998 Firebird Formula LS1

    It hasn't thrown any codes?

  9. #9
    Junior Member red98ta's Avatar
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    RED
    1998 Trans Am

    yeah smog pump, but that should'nt have anything to do with it. right?

  10. #10
    Member chris1974's Avatar
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    Bright Red
    1998 Firebird Formula LS1

    dunno about smog pump.... Could it be a bad cat??

  11. #11
    Junior Member red98ta's Avatar
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    RED
    1998 Trans Am

    well when i put on new exhaust think im takin it off.

  12. #12
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    where at in Ohio? It could be a few things really. The best thing is to log the car if you have access to a scanner that will let you see live data. See what your fuel trims look like and things like that. What you're describing does sound like it could be a plugged cat to me. They almost act like an engine brake and make the car have next to no acceleration. Either that or it's loading up with fuel but normally if that's the case there will be other symptoms.

  13. #13
    Junior Member red98ta's Avatar
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    RED
    1998 Trans Am

    im in newark ohio. when i get the exhaust should i take the cat off?

  14. #14
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    2008 Hummer H3

    Quote Originally Posted by red98ta View Post
    im in newark ohio. when i get the exhaust should i take the cat off?
    I would if you can..

    You don't want it on there if it's pluged up as it can harm your engine as well as hurt performance.

    Hell you don't want it if it's working..

  15. #15
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    Quote Originally Posted by red98ta View Post
    im in newark ohio. when i get the exhaust should i take the cat off?
    I'm not very far from you.......I'm in Lancaster. Yes....I'd yank those cats. A plugged cat will cause exactly what you're describing. Let the weather warm up and settle in and if you haven't got it figured out by then I can give you a hand with it. I have hptuner and efilive.

  16. #16
    Member 88gtman's Avatar
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    Red
    1998 Trans Am

    I agree with everyone else. Sounds like a clogged up cat to me.

  17. #17
    Junior Member red98ta's Avatar
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    RED
    1998 Trans Am

    thanks a bunch, just received slp exhaust today does it need 02 sensors installed?

  18. #18
    Member jsmith564`'s Avatar
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    yellow
    2004 gto

    yes, you need o2 extensions. most vendors carry them.

  19. #19
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by red98ta View Post
    thanks a bunch, just received slp exhaust today does it need 02 sensors installed?
    Yes but you only surely need your front 2,, left and right banks as those are related to AFR's (air fuel ratio).

    The cat 02's can be eliminated with no adverse performance effects.

    You will get a cat code and a SES (service engine soon) light but that can be turned off with a tune.
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  20. #20
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
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    Keep us posted OP. We can help some more if needed.

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