Starts up then begins to run rough and dies

[XfireZ51]

Went to take Z out yesterday for a quick run. It had been out a few days prior w a datalogging session. No problems. I have an Ostrich 2 emulator in the car. New bin, car wouldn’t start. Re-load, same issue. Replace Ostrich w flash prom, car starts using previous bin file but get a Code 41. Flash prom w new bin, car starts but begins to run rough then dies. No code.
I check FP, static w ignition ON jumps to 50psi then drops to 40.
Nothing changed except for loading new bin in Ostrich. With the new build, I’ve been working on refining VE table as well as setting timing now that I don’t have knock. Car has been running great. New bins flash SES w ignition ON as they should. ECM flashes Code 12 when in ALDL as it should.
Also compared the bin files and nothing appears out of whack from one cal to the other. My suspicion is fuel pump.
Discuss.