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Thread: Back firing

  1. #1

    Default Back firing

    I Have an LS3 engine I have fitted an atomic LS to it and it is starts and runs but it has a backfire coming from each bank at idle and off idle I have gone through initial setup again and it is all 100% cannot put my finger on it help needed.

  2. #2
    msdtech1955 Guest

    Default Back firing

    could be a plug or spark plug wire.

    msdforms@msdperformance.com







    Latitude: 31.730125
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  3. #3
    msdtech1955 Guest

    Default Back firing

    is this a new motor or from wrecking yard



    compression or leak down test?



    stock cam or aftermarket?





    msdforms@msdperformance.com







    Latitude: 31.730125
    Longitude: -106.29673








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