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Your problems sound like they are in the install and tune. Not the ecu.

The sm4 still has only 4 ignition drivers so the expander increases this to as many as 8 or 12. That way you dont have to run waste spark and your coils will go further without breakdown.

I use mine for *A/C control like standard

*NOS control

*Launch control

*Boost control

*Fan 1 and Fan 2

My own car has had limited amount of tuning due to lack of time, but still starts, drives nicely and makes heaps of power all with no missing or flatspot's.

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