Have you checked for a pulse signal using a noid light at the injector connector?

Reading back through the thread, it sounds like the *assumption* that the ECM isn’t pulsing the injectors has been made, but no actual testing has been done to confirm that.

If the noid light doesn’t show a signal at the connector (make sure to check one injector on each side as the 12v power feeds split into 2 groups before the connector), back probe the same pins at the ECM and rig the noid light. If there’s a pulse signal while back probing, there’s a problem with the wiring harness. If no signal while back probing, I’d verify all the power and ground feeds to the ECM are good before continuing to chase and replace anything else.

Below are the individual circuit pin outs for the injectors at the ECM. Note that injector 8 is the only one on connector 1 and the rest are on connector 2.

 

 

So for my 93 5.7 I am on my 3rd ICM in 350k miles; each time it failed motor would crank but injectors would not pulse. I could keep it running by adding gas down the throttle body. I have had both sudden failure & intermittent no runs. I misread, thought that had already been changed.

 

You say the CMP (Cam position sensor) has been replaced.. Did you use a scanner to install the distributor, and/or "time" the engine? It is absolutely essential that the distributor be timed using a scanner. You have to set it to "0" degrees using the scanner so that the ECM can then control the timing internally. I don't see any mention of how you installed, or timed, the distributor, or CMP.