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Thread: MSD 6425 (Digital 6AL) and MSD 8732 (Digital 2 Step) Issues

  1. #1
    flat4tom Guest

    Default MSD 6425 (Digital 6AL) and MSD 8732 (Digital 2 Step) Issues

    Hello,

    I am having an issue with my new Digital 6AL and the Digital 2 step I've installed. Here is what I have...

    It is installed in my VW drag car. I'm using a Bosch 009 distributor with a Compufire points replacement. This is a new race car.

    The 6AL is functioning fine. However, I'm on my 2nd 2-step box. I returned my first one because I thought it was working then stopped. Now I'm not sure it ever worked. I discovered I was able to rev over any limit I dialed into the 2-step.

    I exchanged that 2-step for another 2-step and wired it in last weekend. However this 2-step is not working either. I can dial in any rev limit and rev past it with the LED on the top of the 2-step glowing away like it should.

    I've wired it in as per the directions. Soldered all connections and heat shrink tubing sealed them (both installs). The LED on the 2-step comes on when it should with either my burnout switch or staging brake however it does not stop me from revving up to my 6AL rev limit. My tachometer is functioning fine as well.

    Any idea on where I can check for problems? I'm somewhat at a loss since wiring this in is so simple, but it is not working. Thanks.

  2. #2
    msdtech1955 Guest

    Default

    what brand on spark oplug wires are you currently using ?

  3. #3
    flat4tom Guest

    Default

    Standard Bosch wires (silicone wires, bakelite ends), nothing fancy. Plugs are NGK

  4. #4
    msdtech1955 Guest

    Default

    are they solid core ? or carbon-core

  5. #5
    flat4tom Guest

    Default

    They are carbon core.

  6. #6
    flat4tom Guest

    Default

    How does the 2-step communicate with the 6AL to tell it to keep the rev's down? I'm thinking it has to have something to do with the gray wire...? :001_unsure:

  7. #7
    msdtech1955 Guest

    Default

    sir , can you put the 6al limit as low as you can ..and test to see if the limit is working ..also ..did we cut the loops for 4 cylinder operation ?

  8. #8
    flat4tom Guest

    Default

    Yes, I'm going to try setting the 6AL box limits down and see if that works today.

    I've tested the red power, ground and blue switched power is working to the 2-step box just fine.

    Yes, both of the wire hoops have been cut. I'll report back.

  9. #9
    flat4tom Guest

    Default

    OK, I lowered the rev limit on the 6AL box and the car would not rev over those limits, also my tachometer showed what the rev limit was set to when I put power to the ignition - so the 6AL is working.

    I did a bit of rewiring on the gray tach line to exactly match the diagram (electrically no different) just to be safe. Made zero difference. Whatever I dial into the 2step, I can rev right past it up to the 6AL limit. Once again the light on the 2step is coming on indicating that it IS working.

    The 2step is clearly not working. This is so frustrating, :angry: and I have a race tomorrow. I guess I'll just have to race without it.

  10. #10
    msdtech1955 Guest

    Default

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

    tom , got the problem solved....:thumbup1:

    now hang foot in that bug.....

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