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CARDONE786398 PCM is the one you need. rockauto, oreilly's, both say they have them, may be who your using.
On your PCM, check where circled, below this one happens to be LAW0
I have a HIX2 here that I was sorta holding onto in case I decide to go to OBD2 one day. But I'm guessing you have some issue other than a bad PCM.
Your indicated symptoms are a bit of an odd mix in that you can start the truck by shorting around the FP relay, yet you don't get fuel or spark with the SPOUT removed? That just doesn't add up to me.
Just to clarify my issues, I have no fuel pump activation regardless of the SPOUT connector. The engine only runs when the fuel pump relay is manually grounded
And, I only have spark when the SPOUT connector is not present. There is no spark with the SPOUT connector plugged in.
The crank (or cam?) position sensor is a new one, as is the ignition control module and the distributor.
I'm going to O'Reilly's today to pick up yet another Cardone PCM.
I really need a breakthrough here. Can anyone please help?
You are going to have to do some massive testing on you wiring harness.
You might have bad wiring, causing a malfunction with the PCM.
In other words, you may be getting "good" PCMs, and your wiring in the truck is bad.
You'll have to verify that the PCMs are still "good" after you plug them into your truck.
Disregard my post #11 above.
I did not realize that you have an OBD II system and I was thinking about an OBD I system.
My guess is that you are missing an input to the PCM and that is why it is not grounding the Fuel Pump relay and allowing the ICM to fire the coil.
Have you ran the codes?
They may tell you what is wrong with the PCM inputs.
I disagree. These PCM's are now 25-35 years old and the capacitors are very prone to leakage/failure at that age. I've seen it several times. In fact, I just experienced it again a couple days ago - this time it was even a "sold-as-rebuilt" PCM (although the capacitors looked original to me).
That said, it seems very unlikely that you've got 3 bad rebuilt PCM's in a row. Definitely pull codes - it's even easier with OBD2 (universal scanners) and probably gives you better data than OBD1.
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