He missed a comma.
The PSD's do not have in injection pump and injectors like the IDI's do. They run a HEUI injection system Hydraulically operated, Electricaly actuated, Unit Injector. A HPOP - High Pressure Oil Pump uses the engine lubrication oil, increased the pressure of the oil, and uses this high pressure oil to fire the injector, rather that fuel pressure in the IDI. On a full throttle accell, the oil pressure in the injectors can reach 4000psi.
The list he provided:
Fuses - A common issue on the 7.3 is the fuel heater, in the fuel bowl, can short, blowing the fuse. This fuse is also the same fuse that provides power to the PCM - Powertrain Control Module (computer) - no computer, no run
CPS - Cam Position Sensor - Exactally what it sounds like. It is a Hall Effect sensor that tells the computer where the cam is. If is fails it causes an no run, or a no start condition. They can also be marginal, and work some, and not some.......
Fuel Pump - Electric lift pump, on the frame rail I beleive. Can you hear it run, if not check the fuses and relays that run it......
Relays - I a relay falls that powers the PCM, Fuel Pump or other engine control electronics, that can shut the engine down.
Oil level - back the the HEUI system.... if the engine really low, there is not enough for the HPOP and the injectors do not fire. I also see this as somewhat of a "safety feature" If you loose alot of oil, the truck will shut down before you run the engine dry......
