Random no-starts

I have a 92 Olds 88, and it runs great. When it starts. The fuel pressure is fine, new fuel pump, filter, and pressure regulator. New plugs/wires, new ignition control module. It will run fine, I'll shut it off, and it won't start again. When it won't start, I hooked up a noid light to the injectors, and they don't fire at all. I'm trying to figure out if my crank sensor is hooked up to the ignition or the injectors, or if anyone has any other ideas to replace? My only other option I can think of is the PCM.

More than likely the crank sensor is bad or the wiring to the ign mod. from the cps. The cps is connecte to ign mod. and the pcm to generate a signal for spark and injector pulse.