I am about ready to tear out my hair on this COP conversion.
Got everything mounted and wired, tested the car, it started and ran after fixing one small wiring mistake. No big deal.
Button up the harness, connectors, etc. No tachometer. After a long while I trace it to a short between the ground and tach signal wire. Very annoying, but no big deal. Test the car again, works great for a moment, then no tach. Again. The short had re-developed ( :$ ) and I gave it a more permanent fix.
As I am wrapping up the harness connector, poof, two coils stop working (1&4, wired for wasted spark). Unwrap the connector, poof, they start working again. Wrap it up, poof, not working again. So, I've got an intermittent short in the connector. Again.
I say screw it, cut out the connector, and hardwire everything. Still only two coils running, 1&4 are still dead. So I swap coils, coils are good. Check wires with ohm meter, they're still good. Crack open the ECU, all ignition transistors still good.
What the heck?
The only think I can think of now is to check that the coils are indeed still sparking (I have extra plugs) and to pull the plugs on 1 & 4 to see if they're fouled so bad they won't even pretend to run.
Thoughts?