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Uneven firing at 950-1200 rpm

You should probably specify which wires to probe. Are these the ones you are talking about? And youll have to poke through the wires to take the reading as the truck will have to be running for some. You want to check voltage between these and the battery ground, and compare the difference when using the IP ground?

color-------PMD pin-------voltage-------Truck Running
Lt Grn--------A------------1.9V-----------idling
Red----------E------------4.0V-----------idling
Red----------E------------5.6V---------Off w/ IGN ON
Lt Grn--------C--------(GND in PCM)------Anytime
 
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