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Thread: Help needed

  1. #1
    Junior Member APPRENTICE
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    Jun 2003
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    Gainesville, VA
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    17

    Help needed

    My dragster starting acting very strange today. Would turn on fuel pump (fuse issue) then tach is bouncing all over throughout rpm range from idle on. It's a 582 with msd 7al3 and 16 volt system. Car seems to run fine but I am concerned the ignition is shot. Any thoughts from the group. Thanks Todd

  2. #2
    Senior Member RACING JUNKIE Swiley383's Avatar
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    Apr 2010
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    White Bluff TN
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    604
    Check your grounds first that is always my first suspect I have seen them cause strange things.i would also check the tac

  3. #3
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
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    7,334
    Not only the grounding POINTS but also for a broken wire will 'make and break' with engine vibration.
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  4. #4
    Senior Member EXPERT BUILDER gearhead1011's Avatar
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    Jan 2004
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    Shepherdsville, KY
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    313
    X2 on the grounds and don't count on the chassis for a ground. Run a wire from the battery to the MSD and one from the battery to the heads. You also should have a dedicated wire from the positive battery terminal to the MSD 12V. If it's not wired like that change it even if it has been like that since the car was built.

  5. #5
    Junior Member APPRENTICE
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    Jun 2003
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    Thx all. Tearing all down and looking today


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