How long after the gas pops does it stay running ? what rpm and what EGT does it go to before stops. What message comes up?

You say you "ran the fuel test with the circuit - no change", still not sure if you are saying that the prime function (pump) worked or not.

If the pump is working in the prime, and you are not sure if it is working during the startup, put a little dab of paint on the end of the shaft, this will let you see it turning.

The 64200 thing looks like an ECU or rpm pickup problem