I know there has been success using an early model GM HEI ignition module in the 22R ignition https://www.yotatech.com/forums/f116...ersion-211966/ , but has anyone tried using the later model GM HEI ignition module in the 22RE? It may work if someone can verify/identify the signal out, and signal in wires to/from the igniter/ECM and that the igniter is sending a DC square wave.

Toyota...



GM HEI w/ECM controlled timing...

 

I checked the igniter to ECM patterns with my scope, no go. One of the patterns is an inverted square wave, it wouldn't play well with a GM module without an inverter. Oh well, interesting anyway.
Blue wire



Green Wire