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  • 1 Post By rspears
  • 1 Post By rspears

Thread: EFI and MSD
          
   
   

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  1. #1
    bobsundance's Avatar
    bobsundance is offline CHR Member Visit my Photo Gallery
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    EFI and MSD

     



    I have the MSD digital 6 box with the gray wire for the EFI signal. Question is can I split the gray wire to run my tack and EFI unit?

  2. #2
    rdobbs is offline CHR Member Visit my Photo Gallery
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    I've hooked up a few 6al boxes, but never on EFI. You could always try your
    method and see what happens, or better call the MSD tech. Maybe someone
    here has done this before and will answer your questions.
    Good Luck

  3. #3
    bobsundance's Avatar
    bobsundance is offline CHR Member Visit my Photo Gallery
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    Edelbock said no MSD said yes. There has to be away

  4. #4
    rspears's Avatar
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    Quote Originally Posted by bobsundance View Post
    Edelbock said no MSD said yes. There has to be away
    On your other thread you said,
    Now Edelblock says don't use the ground off the MSD unit from a Digital 6A box to the car tach, and to call MSD; and MSD says its fine to use it for both.
    Is this gray wire a ground or the rpm pulse signal?
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  5. #5
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    we obviously dont know how to help you fix this .. i doubt any one of us has experienced this .. your only hope is help from edelbrock ..quit beating us up cause we cant fix it ..
    iv`e used up all my sick days at work .. can i call in dead ?

  6. #6
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    am just looking for someone who has Edelbock EFI and MSD box that runs a Tach in there car to see if the gray wire well run both or not, but I guess from what you say nobody does this and there is no help here OK thanks

  7. #7
    rspears's Avatar
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    Forget the tach for now, wire it per instructions and see if you can get past the air/fuel problems with Mark's help. If you get it running right, then you can try paralleling the two signals from one output to get the tach functional. Focus on the real problem first, then the secondary crap.
    NTFDAY likes this.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  8. #8
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    350 Chev with FAST EFI

    This vacuum issue might well be your problem, too, Bob. Did you tell the shop that did your engine that you were looking at running EFI? If not they may dumped in a cam with too much overlap that bleeds off your vacuum at idle & cruise. That was one of the key questions from my guy when we were discussing the needs for my engine.
    Dave Severson likes this.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

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