Originally Posted by
vilefly
WAIT! Damn it. I am over thinking this....you can hook up the OEM ecm to the northstar module's EST input directly, since it is still getting a signal from the optispark. NO LOSS OF FUNCTION. The ignition module will still decide which coil to fire + dwell, and the other outputs need not be connected at all (to the ECM). That is how Deltec did it! Would need a harness to prove it, but not really. As long as the crank signals are adapted for the northstar module, it should be fine. Will have to tie the BYPASS input to constant 5v to put it into constant EST mode like the original ignition module, but it has no reason not to work.
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