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Have you checked to see if the pump is actually sending fuel to the filter housing?
Do you know how to check the high pressure pump reservoir to see if t is full of oil? There is a small hex plug on the top of the cover, remove it and stick something in to check the level, it should be about 1/2"below the top.
It is at the very front of the engine under the lack plastic powerstroke cover, right beside the oil pressure sending unit.
Let me know what you find.