2004 300 hpdi cranks, pops no start

[Blazer340hpdi]

I have a 2004 300 hpdi z300txrc 25"shaft that I have been trying to bring back to life after fuel fire on port side. I have replaced all harnesses on motor. Both injector drivers, water seperator, vst, high pressure fuel pump and both rails. Motor has 125 psi across all cylinders. I have yds hooked up and I have 52 psi at vst and 876 psi while cranking. I have spark at all cylinders, fuel seems to be getting to cylinders. It pops and tries to start. I've replaced all filters, low pressure pumps work fine, confirmed I have fuel flow back to a gas tank. VST is clean, I have linked and synced it. It doesn't try to pop hardly at all in neutral, I have to open up throttles in neutral to get it to even 3-400 rpm. I have a yamaha 340 hpdi on my bass boat so I have been able to swap parts over to test, ecu and injector drivers, rectifier and stator, pulsar , ecu relay , fuel rails and injectors all have been swapped and work perfect on my other boat. I'm at a loss. My kill switch doesn't work when lanyard is pulled out it doesn't show any change on the yds software. When I unhook it and put the two connectors together it shows kill switch activated and the alarm goes off. So the switch is stuck shut which should still make it start. I pulled the kill switch off my other boat and no change.

[Blazer340hpdi]

Figured it out. Ring inside bottom of flywheel has hairline crack and it spun on flywheel about 60 degrees. Timing was off. Ordered new flywheel.