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Thread: new msd 6a box problem

  1. #1
    Senior Member SENIOR BUILDER
    Join Date
    Apr 2007
    Posts
    105

    new msd 6a box problem

    New 6a box matched up with Flamethrower hei distributor.Engine ran well before the install.Now the engine hesitates when reving up.I know of this prob with the 5 and 7 pin module in the distributor.There is a resistor that is needed to correct this prob for the 5 and 7 pin module.My module is a 4 pin and has the stumble,hesitation of the 5 and 7 pin.Any ideas why I have this problem?Thanks.

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    635
    Take the module out, run the pickup coil straight to the MSD. You don't need the module.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

    Good work isn't cheap, and cheap work can't be good.

  3. #3
    Senior Member SENIOR BUILDER
    Join Date
    Apr 2007
    Posts
    105
    Mechanic did not remove the module on install.Wired up for 4 pin and I made sure module was removed.Car idled fine and would not turn off when ignition is in off position.Wired the diode in and problems solved.Whom so ever purchase a 6a box for gm hei 4 pin module.Make sure you order pn 8860.Your going to need it.I was lucky the local speed shop had the part in stock.


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