I have an ignition schematic and the connections on the crankshaft sensor and the cam shaft sensor will only fit one type sensor ( The only sensors on the ICM harnes)..... I also checked the injector pulse with my noid light and it was not lighting so I don't have any injector pulse either. I'm frustrated that the engine was running fine until the plastic connection broke on the original Crank Sensor..... when I replaced the CS is when the engine would not start.... I have replaced the CS a couple times now to make sure I had good ones........ no luck.

I believe the injectors get their power feed thru the ICM.(Check with your schematic) The sensors are 3 wire if memory serves me, so there should be 5v,ground and signal reference on each sensor . check for 5v and ground at the sensors and then see if you get reverence at the ICM connector. Basically with the schematic go thru the wires and make sure you get what you need on each including load testing the wires,including the power feed and grounds.

Wiring

I've changed the wiring and ai have continuity on the legs.... No luck, still won't start

Is the harmonic balancer good?

I have a brand new harmonic balancer for a 1990 88 if that has the same one new on a shelf, not gonna be used by me anytime soon. I dont know if it costs much but figured to put that out there

I'm working with a brand new balancer ...thanks anyway

Have you followed all the testing procedures in the link below?
https://easyautodiagnostics.com/gm/3...-sensor-test-1

I have no spark at all the towers and I have no spark at any of the injectors. I have a new coil and a new ICM and I've replaced the crank sensor 3 times and I still have no spark.

We all know that you have NO spark or injector voltage but have have you followed all the testing procedures in the link below? If so, what were the results?
https://easyautodiagnostics.com/gm/3...-sensor-test-1