isx 871 no start

[towingdiesels58601]

I have an cm871 that will not start, the driver fueled up 6 miles before the turbo grenaded climbing a hill, we towed it in, replaced the turbo and it would not start.

... it is a w900 that i bought about a year ago with de-mandated programming. It had a aftermarket turbo and manifold, ran fine for the past year with occasional hard starting spurts.

We began diagnosing the truck, mechanics said it had a code for low fuel pressure.

We replaced the high pressure fuel pump and the lift pump, primed attempt start nothing.

We removed the fuel manifold and checked for debris replaced pressure regulators and anti-drainback valve.

Still, no start.

We removed ecm and installed on another truck, the other truck ran fine.

We swapped the fuel and timing actuators onto another truck, and that truck runs with the actuators.

We verified that the ecm has all powers and grounds, ignition power and that the wiring harness has good continuity to the fuel and timing actuators.

We verified the cam timing by pinning the crank and sliding the timing wedges in against the cams.

We have verified the cam and crank position sensors are reading and that the tone rings are not loose or missing teeth.

We have verified fuel pressure using insight, we have verified that the engine rpm while cranking exceeds 150rpm required to start.

We have verified that the engine has compression.

The engine will run on ether only until we quit giving it ether.

We removed injector #1 and verified we are getting fuel from the passage in the head, we also looked at the top of the piston to verify it looks alright not broken.

I believe we have done everything that quickserve suggests and then some.

If I am missing any diagnostic tests I would like to know. We may have done tests that I forgot to mention.

Forgive me as the list is long. Any assistance is greatly appreciated.