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How to wire 300m coil on plug in parallel

Posted by punk3rz, Oct 8, 2018

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  1. punk3rz

    punk3rz Proven Member

    Joined Jun 1, 2012
    Surgoinsville, Tennessee
    After doing much research, I wasn’t able to find much information on wiring 300m coils in parallel, all the DIYs are in series (wasted spark).
    I’m not going to go into details on why you would wire it in parallel vs series, but here is how it’s done.


    Wire all the lower pins of the coils together to the single pin side of the blue divider on the triangle plug. (#1 on the diagram)
    Wire the top pin of coils 1&4 together to #3 on the triangle plug.
    Wire the top pin of coils 2&3 together to #2 on the triangle plug.

    Due to the many different combinations (1g/2g, 6 bolt/7 bolt, ecu year, 1g cas in 2g, etc) If you complete this wiring harness and your car will not start, simply switch wires 2&3 on the triangle plug (this will reverse the firing order) and it should start.

    If you have any questions or feel any information should be updated, please feel free to comment or message me.

    Street Build 582  9

    1998 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    my98gsx and pat white like this.

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