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Thread: No Spark???

  1. #1
    Newbie SkintBack99's Avatar
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    Default No Spark???

    I have some questions that you all might be able to help me out with, I was getting my rig ready Friday night and started it up, it was idling and then quit? I tried to start and I am not getting any spark. I have alreadyt replaced the coil, voltage regualator nothing, cranks but does not fire. There is another box beside the volt reg and that is my next step is to replace that. I am not for sure if I have hooked everything back up "correctly" either I put a test light on the volt reg and 3 of the 4 wires shows its getting juice? When cranking they all have power and the box feels warm? I know I am rambling on but in need of some advice on what to do next. It is a 1976 CJ 5 304 with a T150 speed
    Thanks
    The United States doesnt need the Marine Corps, The United States wants the Marine Corps!

  2. #2
    Senior Member HillBillE's Avatar
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    One thing I can think of is the coil ground, especially if it's the stock, round, fluid filled style.

    I've had problems with them not getting a good ground through the bracket after replacing them.


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  3. #3
    Newbie SkintBack99's Avatar
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    I put a chrome cover around the coil before it started this? You think that might be the problem
    The United States doesnt need the Marine Corps, The United States wants the Marine Corps!

  4. #4
    darwinism at its best irish1371's Avatar
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    yes the cover could be a problem, but it could be that the new cover let the coil over heat and caused it to die. Or the new cover let the coil vibrate to death. are you running a stock dist/coil set up?
    "Some people wonder their whole lives if they will ever make a difference. Marines don't have that problem." Pres. Ronald Reagan
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  5. #5
    Newbie SkintBack99's Avatar
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    I have done some more research, and I think it is the Ignition module control unit. I have another new coil and voltage regulater and I got a external resistor. The problem is I have never had a external resistor and it ran fine. On the back side of the old voltage regulator there was a resistor, the two wires from the coil go directly to the ICM so? I dont want to add anything that I didnt have before but I am thinking that the new regulator does not have the resistor on it.
    The United States doesnt need the Marine Corps, The United States wants the Marine Corps!

  6. #6
    Mountain Valley Customs
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    On your style of ignition system, the ignition control modules are prone to dying. Whenever I have had a vehicle those ignition control modules, I've always carried an extra one. Late '70s Fords are known for killing those modules.
    Mountain Valley Customs www.mvcustoms.com 570.217.7284
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  7. #7
    Newbie SkintBack99's Avatar
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    SO what should I do about the external resistor? I have never had one on it like the one I bought and the guys at NAPA said it couldnt hurt either way. Would I run it from the ICM then the external resistor then the -side of the coil?
    Thanks for all the input got some time this weekend to get back at it
    The United States doesnt need the Marine Corps, The United States wants the Marine Corps!

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