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I came across asking myself today, do you need a igniter when you go to a aftermarket ECU and Harness? I noticed my friend is running a MOTEC and does not have one for his car.
 

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As long as your aftermarket ecu can directly drive “smart coils”, an igniter is not necessary. Most modern standalones have 6-8 coil outputs and the ‘smart coils’ have internal igniters.
 

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Dr. Jeff Lange
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9,347 Posts
If you are running the stock coils you will need some sort of igniter. If you switch to coils with a built-in igniter you won’t need the stock one.

Jeff
 
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