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Thread: Megajolt conversion

  1. #51
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    The two wires from the stock coil the blue and black with yellow stripe wire what are those hooked up to



  2. #52
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    All that is still as is. Didn't cut anything or remove any stock components yet in case the edis didn't work. All I did was unplug the two connectors from the coil when I was testing the edis. Well that and plug wires of course.
    Right now it's back to stock cause I had to drive it to work today.
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  3. #53
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    Re: Megajolt conversion

    Quote Originally Posted by InAccordance View Post
    All that is still as is. Didn't cut anything or remove any stock components yet in case the edis didn't work. All I did was unplug the two connectors from the coil when I was testing the edis. Well that and plug wires of course.
    Right now it's back to stock cause I had to drive it to work today.

    Im guessing the relay needs a tach signal maybe from your new setup or you'll have to redo the relay somehow.

    Please don't bypass it unless just for testing. You want the fuel pump off if your motor isn't running.
    1988 Lxi owner since August 1995
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    Now running E85.

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  4. #54
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    Nah, for sure.. wouldn't out right bypass it as a permanent thing, just testing things for now.
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  5. #55
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    What powers the Edis

  6. #56
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    I see you have your shielded wire properly grounded to pin 7


    https://images.app.goo.gl/VffhDWmFU8mYgKar6

  7. #57
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    First ran it off the battery to make sure it worked, then switched it to the wiper fuse. That one has good power and is switched to the "on" position
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  8. #58
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    Quote Originally Posted by InAccordance View Post
    First ran it off the battery to make sure it worked, then switched it to the wiper fuse. That one has good power and is switched to the "on" position
    I assume as long as you got 12 volt that should be good. I use the original coil Black and Yellow wire for my power

  9. #59
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    Assuming blue wire is ground?
    I just grounded the edis and mj in the battery. Seemed logical lol
    Would using the power wire from the stock coil basically trick the pump relay?
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  10. #60
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    Possibly it may need to see the power coming from the coil wire. And that blue wire is your RPM signal on fuel injected model
    Last edited by Shane86; 06-25-2019 at 01:50 PM.

  11. #61
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    I'm wondering if you got that shielded jacket grounded properly on pin 7. I kind of went through the same deal setting up mine. Those wires are real sensitive and can pick up signal real easy and cause a misfire
    Last edited by Shane86; 06-25-2019 at 01:51 PM.

  12. #62
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    I dont think I do have it setup right. I have the vr sensor wire shielded and is grounded to the body on the sensor end and ran into pin 7 on that end but did not run that into the main ground. I'll have to fix that.
    Good looking out.
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  13. #63
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    Pretty sure the carb and fi use the same coil setup. The wire colors and everything are the same in any case.
    So blue wire is tach signal.
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  14. #64
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    Yeah try that out.

  15. #65
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    Re: Megajolt conversion

    Quote Originally Posted by InAccordance View Post
    Pretty sure the carb and fi use the same coil setup. The wire colors and everything are the same in any case.
    So blue wire is tach signal.
    Yes I know on a blaster coil the blue wire goes to the negative side of the coil

  16. #66
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    Ok so.. if I ran a wire from the tach out pin on the mj unit to that blue wire, that should in theory send a signal through said wire into relay?
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  17. #67
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    Quote Originally Posted by InAccordance View Post
    Ok so.. if I ran a wire from the tach out pin on the mj unit to that blue wire, that should in theory send a signal through said wire into relay?
    Possibly after reading through knife mine's set up apparently that tach signal has something to do with the fuel pump relay

  18. #68
    LXi User Shane86's Avatar
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  19. #69
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    Re: Megajolt conversion

    Quote Originally Posted by Oldblueaccord View Post
    The stock fuel pump relay,well for EFI, looks at the neg side of the coil to confirm the cars running that might be what you need.
    This

  20. #70
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    Well yea, there it is. So I need to get a tach signal into the relay.
    Knife doesn't say what he did to fix that issue though, I wonder what he did.
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  21. #71
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    Quote Originally Posted by InAccordance View Post
    Well yea, there it is. So I need to get a tach signal into the relay.
    Knife doesn't say what he did to fix that issue though, I wonder what he did.
    I know I wish he would have said what he did at the end

  22. #72
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    I'll try the tach out on the mj unit the next time I get to mess with it.
    Thanks to all you guys for the help. 👍
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  23. #73
    LXi User Shane86's Avatar
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    Re: Megajolt conversion

    i hooked up the wire that i had goin to the coil, i think it was blue, to the 'tach out' from the MJ, and now the tach and the fuel pump work.

    -screenshot_20190625-182019-jpg

  24. #74
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    Many tachometers can accept the signal emitted from the Tach Out on the MJLJ module. This Tach Out signal provides a 12V pulse for every ignition event. You may use this to provide the signal to compatible tachometers, or to provide a signal to a separate Engine Control Unit, data logger, or other device which requires this signal.

    From the instal guide. May just work.
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

  25. #75
    LXi User InAccordance's Avatar
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    Re: Megajolt conversion

    Lol posted at the same time
    Originally posted by ShiRen:
    Nice car or not, nobody likes losing a race to an old 4 door Honda.

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