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Old 03-07-2015, 08:44 PM   #1
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Default Miata Coils Wiring

Hi there,


I am currently wiring in a Motec M8 into an Toyota 3S GE engine using Miata coils (running wasted spark)...


I would like your help figuring out the coil wiring. My coils are as follows





Just want to know how to wire them basically, what is trigger, +12V and ground.


Are these coils of adequate quality. The car will be N/A so no need for very strong ignitions.


These are smart coils correct? They have built in ignitors??


Sorry I searched but couldn't find this info an no adequate wiring diagrams.


This setup is not mine, Im just finishing this project and doing the tuning on it.


Thanks!
Paulo
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Old 03-18-2015, 05:12 PM   #2
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Hi,

Please can someone help me on this?

I recently powered up the ECU (Motec M8) and the coils overheated a lot...theres certainly something wrong with my wiring.


Can someone help?

Regards,
Paulo
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Old 03-18-2015, 05:16 PM   #3
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Your vehicle is not even a miata Sorry bud, no idea.

Others whom have built miata specific looms may chime. Best of luck to you.
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Old 03-18-2015, 10:36 PM   #4
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Hi

Thanks. Ive found some wiring diagrams and I think Ive got it.

From the right, when looking to the coil terminals, its, 12V, spare, trigger and ground.


I will try that today and see if the coils keep cool.

Thanks,
Paulo
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Old 03-26-2015, 05:45 AM   #5
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Default FINALLY

So Ive worked it out.

I downloaded 2 mx5 wiring diagrams, one for the 4 wire type coils and one for the 3 wire ones (different model years)

Both were wrong and produced no spark.

The final setup that worked was:

12 V
Spare (previous tacho)
Ground
Trigger

In the both diagrams the trigger came between the 12V and Ground...not on my coils...
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Old 03-30-2015, 04:28 AM   #6
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How shitty are the 3S-GE coils that a Miata coil is an upgrade?
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Old 03-30-2015, 07:55 AM   #7
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Nice input lol

This is a budget build...MX5s were available and they had to do.

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