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misfire in all 8 cylinders

This is a discussion on misfire in all 8 cylinders within the General Help forums, part of the LSx Technical Help Section category; About 18 different mechanics have no idea what's wrong with my car. It's an '02 TransAm, Borla exhaust, longtube header, ...

  1. #1
    Junior Member
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    2002 Trans Am Ws6

    misfire in all 8 cylinders

    About 18 different mechanics have no idea what's wrong with my car. It's an '02 TransAm, Borla exhaust, longtube header, no cats. A few days after the headers were installed, I hit a major pothole, and from that moment on, it's been running like crap! It misfires in all 8 cylinders, lack of power, and today my legs felt like they were burning cuz of heat coming from under the steering column.

    I've replaced the coils, fuel filter, and MAF sensor. The plugs were replaced when the headers were installed. I've checked all the wires and they seem to be good. It will run ok for about a day if put Lukas Fuel Injector cleaner in it. There are no check engine lights, and no codes stored. Every mechanic I've been to has a different opinion about what it could be, but no one know for sure.

    By the way, there's only 57,000 miles on it. Any ideas on what could be going on with it? Anyone know a really good mechanic to take it to in the Chicago area? Thanks!

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    Check header connection to heads on both sides.
    Check headers themselves to make sure they are in one piece as well.

    That pothole jarred something....

  3. #3
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    2002 Trans Am Ws6

    had those checked too...I'm told everything looks good

  4. #4
    Senior Member Zboner's Avatar
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    99 SS

    take it to a lsx specific shop

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