Got it sucking fuel last by itself, and it looks good in that regard.
I kind of got it running last night, but only on one cylinder #3 was getting plenty of fuel. With glow plugs its actually fairly stable, shut them off it will slowly stall. but Im not sure why that is happening. The other cylinders seem to be getting a dribble compared to 3 which actually squirts. So I'm guessing there is a massive air bubble in the pump. Going to pull all the lines and start bleeding directly out of the delivery valves and work out from there.
I also have no throttle control, pulling on the lever does nothing for engine speed at all, but Im assuming that could be related to the issue that 3 is only getting adequate fuel/pressure.
Weirdly, it starts pretty easy, considering only one cylinder seems to be functioning.