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Backfire and flames shooting out of my tailpipes....something wrong??

This is a discussion on Backfire and flames shooting out of my tailpipes....something wrong?? within the General Help forums, part of the LSx Technical Help Section category; I can see how that could happen. The shorted lead may have caused a misfire that allowed excessive unburned fuel ...

  1. #21
    What Would Earl Do? Vexzer's Avatar
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    Fire
    2002 SS

    I can see how that could happen. The shorted lead may have caused a misfire that allowed excessive unburned fuel into the pipes. The misfire should have been detectable as a separate symptom. You are right that any time we make changes; the changes affect other areas of operation. My answer was somewhat more general having to do with back-rapping and popping exhaust noises [beautiful noises IMHO].

  2. #22
    Senior Member Hurley711's Avatar
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    414 RWHP 395 RWTQ
    00 Black Ram Air Trans Am

    no cats ORY here

  3. #23
    Junior Member 70RScamaro's Avatar
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    89 porche Red
    1970 Camaro RallySport

    backfire

    no cats huh, that is part of ur back fire prob. happens on decel only right? and the part of ur problem is ur probaly running A little to rich , so when jam the pedal ur dumping fuel in fast then u let off fast the ECU and FI and TPS are still in WOT for a second and hence the backfire in ur exhaust.

  4. #24
    Member Rich L's Avatar
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    Burgandy
    2002 Z28

    Quote Originally Posted by Hurley711 View Post
    no cats ORY here
    Well there is your answer. I would worry at all. The cats are literally a barrior to suppress the popping and flashes. It goes with the territory when you remove the cats.
    2002 A4 Z28: SLP LM exhaust and HSW 100whp dry shot.

    NA: 323.4WHP@5360 RPMs, 344.2ft-lbs@4610 RPMs,
    N2O: 417.0WHP@5200 RPMs, 467.6ft-lbs@4210RPMs

    NA: 13.351@107.48mph, N2O: 12.324@117.88


    http://www.youtube.com/watch?v=JMHmdFywR0w

  5. #25
    Senior Member Hurley711's Avatar
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    414 RWHP 395 RWTQ
    00 Black Ram Air Trans Am

    still gonna get her tuned, and have the plugs changed out for good maintenance. It's been over 14k miles since everything was done

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