ISL9 Problems

[mayhem1]

Have a ISL9 CM2250 that came in on a hook no run low rail pressure. Was told customer serviced truck and could not get fuel system to prime, so there is no telling how much ether has been run through it. All 6 injector tips busted/burned. No CAC or intake leaks. Turbo shaft didn't have any excessive play. Checked/cleaned exh back pressure sensor and tube, egr temp sensor, intake, cleaned imap because I didn't have a new one, and exh diff pressure . Did a forced regen everything looked good except for turbo speed which seemed a little high at 54K. Has heavy black smoke. It won't go 5 miles and it derates needing regen. Changed imap sensor, did regen turbo rpms went UP another 10K to 64K. Did test on VGT and it keeps failing. Why didn' it give any codes for actuator or turbo? During regen it maintained at around 92% closed? Is this just hiding the real issue?