4 pin ECU doesn't work. Old 5 pin does.

jos51700 said

If it doesn't work after this, that could compound things!

Have you tried grounding directly to battery?? I had one that had a clean bolted ground to inner fender. Wouldn't run. Lifted the ecu up and it started running, while sparking
and thus grounding to firewall. The fender wasn't grounded.

Click to expand...

"If it doesn't work after this, that could compound things!"
Shush.

Sure have. Good clean grounds all around and a separate wire run to the neg terminal.

Like I have said, I'm rewiring the car anyway. This has been fun, but to much longer and I'm gonna gut the ignition wiring and start from scratch. I have a new ECU connector and harness ready to go. Now if that doesn't work..................