My bad, don't know where to find that resevoir on the 6.0. Will running it on ether and diesel prime it? If the res is empty probably not, the pump isn't self-priming, i.e. it can't "pull" oil thru the line, it relies on positive pressure, it expects the system is full and sealed, then when it pushes out oil an equal amount gets pushed into the res. from the return. no oil in the res, no pressure builds.

At least that's my guess of the day for you, your HP oil system is dry and not pumping the injectors. Someone has to know the 6.0 and how to fill that res or hp system.

I have a complete engine out in the garage/in parts/ I will find out and post when I figure it out

push down on the plastic part in the housing crank the engine and see if the housing fills with oil

Ive got a bad FICM now. Maybe because of boosting dead batts...the surging of volts is my guess. Sent it to ciruit bord medics.... rebuilt for $375 and 24hrs is a long way from the dealer price.
It is on its way home. will post whe installed

Ok, Ficm is back from repair but still wont start. No fuel smell from exhaust at all