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need some HELP!!!

This is a discussion on need some HELP!!! within the General Help forums, part of the LSx Technical Help Section category; I have a 99 ls1 with a hooker headers and exhaust with no cats just my plug in o2 sensors. ...

  1. #1
    Junior Member
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    silver
    1999 trans am

    need some HELP!!!

    I have a 99 ls1 with a hooker headers and exhaust with no cats just my plug in o2 sensors. my problem is it is having heavy back fire running very rich that u can smell it. when it is just idling it runs fine when u get on it at all it has a loss of power it bucks and backfires. it seems like it cuts in and out and the backfiring is very bad i have never had a car do this or even seen it. i replaced the plugs and that didnt change anything. i also unplugged my MAF and with it un plugged it still ran the same. what could be causing this problem. would a air pump being bad cause this kind of problem? i could use some help guys.

  2. #2
    Senior Member Orcus79's Avatar
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    black
    2002 WS6

    Have you had the car tuned? Any codes? have you checked all the waring for any burnt or melted wires?

  3. #3
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    how long have the headers been on the car? It sounds like either a burned O2 wire or you have issues with your O2's one way or the other. How does it run when you first start the car?

  4. #4
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    silver
    1999 trans am

    i have thrown some codes one being the secndary air pump. last night i found a crack in my header and i got it welded up today and the backfiring went away and the car runs alot better. the bucking almost stopped but it is still there. there are no wires burnt i checked for all that i think because of the crack near my breathing tube on my header that it was sucking to much air and my o2 sensor was reading all wacked out readings. i am not sure but i wish the car still didnt buck at a high rpm.

  5. #5
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    silver
    1999 trans am

    the headers are only about a year old but they only have between 5000 and 10,000 miles on them. it seems like ever since i installed them i have had a problem with my car running very rich.

  6. #6
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    sure what you're calling "bucking" isn't a misfire? How many miles on the plugs and wires?

  7. #7
    Member DemonSpeed's Avatar
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    Pewter Metallic
    1999 Trans Am

    mine ran rich after headers. if you dont have a tune you really nead to get one.
    LS6 Engine swap, Custom Predator Tune, Lid, SLP Cold Air, Ram Air H.O. Hood, Hooker Long Tubes, !Cats, 3" True Duals w/Dynomax Bullets, Performabuilt stage 2 w/3600 stall, B&M Trans. Cooler, Moser 12 Bolt w/ 3.73's

    Pics of my car
    http://community.webshots.com/user/demonspeed_ta

  8. #8
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    silver
    1999 trans am

    the plugs and wires i just replaced. one of the codes that poped up i found out was a PO102 witch is a MAF and EGR code so what i did was cleaned my MAF sensor and cleaned my throttle body and everything is now working ok knock on wood. the weird thing is i cleaned it the other day and nothing changed went back and did it again and it worked goes to show u that sometimes your problem is something simple and u need to go over it again 2 or 3 times to double check yourself. i do not have a tune on my car but am looking for one just not sure how to go about doing it.

  9. #9
    We'll be back... GatorSS's Avatar
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    Light Pewter Metallic
    2000 Camaro SS M6

    Get some software and tune it yourself or find a professional tuner. But you need a tune for it to run right.

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