94 1500 dies when warm

That's pretty cool! Could you not just tap into the sensor and watch it on a scope to see the pulses fade or something?
Yep, that's actually how we noticed the difference. It was so minute.
After that, when the problem came in, we threw a cam and crank sensor and that 99% time fixed the issue.
I think the only time we replaced a PCM for that issue was from a truck, we found out later, was an insurance claim from super storm Sandy.