Lets see what we can figure out. Please bear with me. I need to get a handle on exactly what is happening. You indicated fuses are good, so I suspect the ECM 1 fuse is good and has power both to and from it.
Is there power at the pink wire on the ignition coil when the key is in the run position? Have you confirmed ground for the ignition control module which is at the left rear of the engine (black wire/white tracer)?
If you go back to the PCM and check pin 9 EST output signal (at the PCM) are you getting a signal? If you aren't getting a signal right at the PCM, it sounds like the PCM is bad even though you just got it.
When you checked the crankshaft position sensor, was there power at the pink wire (key in run position)? Did you check the purple wire for ground and the yellow for a signal?
One last question. Note that the ICM and VCM both ground at the same location, behind the engine (black wire/white tracer). It isn't uncommon for the splices to corrode and provide a weak signal or no signal. Also, the terminals that are bolted to the engine break. Make sure that wire isn't bad. Check for continuity to ground and wiggle the wires around to see if you lose continuity. I have a feeling this is the issue simply because of the symptoms. However, that is only a guess at this point. You may even want to run a temporary ground for both components to see if that changes things. I feel it got moved around when you replaced the VCM (PCM) and made a temporary connection.
Sorry for so many questions. Just trying to narrow things down.
I attached the entire wiring schematic below for your reference. I highlighted the wiring portions that I felt are relevant to the problem. Note that there are 4 pages of wiring for the powertrain control system. I had to cut each in half to make them readable for you. I did overlap them so you can follow from one to the next.
Let me know.
See pics below.
Images (Click to enlarge)
Thursday, July 29th, 2021 AT 9:49 PM