yeah I had to deal with this monkey business before. In order to eliminate all things I hard wired ecu to cam and crank in engine bay, cam is a green top 4 wires the other plug is a 3 prong that has 2 wires that were inverted due to the coil on plug set up.

Either way I had a direct ground, direct power on both, then ecu feeds and voila, she started!

When I traced issue found factory plug losing current from one side of plug to other.. COULDNT believe my eyes!!
Snipped the plug out and connected all back up and vroom!
Away I went.

Now I have no idea. Could be many small stupid things so in order to rule out. Ill hard wire all, then turn cas with hand to see if fuel pump kicks in. Last time it scared me coz spark is also generated and well... use your imagination... lol.