SCCA RX7 RACER

How is the stock tack (ECM) working in terms of the trailing coil wire signal?Is the coil wire signal sending a ground or is it a power to the ECM each time it fires? Need to know to chang over to a differant type of tack.

Thanks Guys

Silkworm

Dunno the answer to your question per se, but I pulled the autometer Tach signal wire and spliced it into the signal from the computer to the dash tach. I forget how I set it, it's been 5-6 years, I think I had to set it for 6 or 4 cyl, search here someone should have posted this before.

PaulC