Here's what I know:
2006 F350 4wd crew cab with approx. 170k miles
Three months ago had EGR delete done and #7 injector changed.
Progressively took longer and longer to start and was making a very shrilling whistle noise.
Went into store came back out and hasn't started since, towed home.
It has fuel and oil, fuel pressures up, oil fills up filter cavity, filters new.
Programmed scan gauge II to read FICM main volts, FICM sync, IPR and ICP
FICM voltage and sync good
IPR 87.9, IPC 0. Checked IPC sensor with shop air, checked good.
Applied shop air to IPC sensor port and could hear air in pass side valve cover with IPR valve energized or not.
Must be a big leak to have no ICP. Would appreciate any suggestions before spending any more time / money.
Thanks

 

It could be the "Dummy " plugs, stand pipes, or the STC fitting on the High Pressure Oil Pump, all of these are common failure and it is best to take care of them all at once. parts total should only be around 150$ if you hear air leaking then these are the most common causes. worst case is the HPOP itself but it sounds like one of the other parts I mentioned