no start, not getting any spark

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  • seatown88
    Grease Monkey
    • Oct 2010
    • 331

    #1

    no start, not getting any spark

    I'm trying to start my pro3 car for the first time. I have no spark. Things that I have checked and they passed are:

    1. I have continuity between DME pin 1 and coil(-)
    2. DME pin 1 and ground is open
    3. Resistance between DME 47/48 is 520 ohms (CPS)
    4. Resistance between DME 8/31 is less than 1 ohm
    5. I have continuity between DME 36 and main relay 85
    6. I have continuity between DME 3 and Fuel pumprelay 85

    With the battery connected and the key off I have power on DME 18, Main relay 86 and 30

    With the key on I have power on DME 27 and 18, the coil(+) and Fuel pump pin 30. There is no power on DME 2, 14, 19, 24

    So in short, I have power to the coil but no spark. I notice the fuel pump is not coming on with the ignition. I can short the relay and the fuel pump does turn on. I check the relay and it does click when power is applied to it.

    any help or suggestions would be great, thanks.
    Last edited by seatown88; 03-27-2011, 06:02 PM.
  • jlevie
    R3V OG
    • Nov 2006
    • 13530

    #2
    With the checks you've done, I'd try a different DME at this point.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

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    • seatown88
      Grease Monkey
      • Oct 2010
      • 331

      #3
      I think it is the DME. Check engine light does not come on with ignition, can't run through the stomp test. If I ground pin 15 on the DME connector I can get the check engine light to come on.

      Comment

      • seatown88
        Grease Monkey
        • Oct 2010
        • 331

        #4
        it was the DME. I put a new one in there and it fired up. thanks jlevie for all the diagnostic support you have posted, it helped tremendously.

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