Bosch pump rebuild

[blinkyeatu]

Ok started it the other day and there is fuel at the injectors just with very little pressure, which makes me think it's not the solenoid but maybe the vane pump (which I don't really get cause it was filled with diesel straight away, I paid extra attention to them when rebuilding it AGAIN and it ran fine when I first started it)
But then I don't get why the fuels just flowing through the return.

I took the head of to see if the fulcrum leaver had snapped as someone had the exact same scenario and that was the cause. But fine was all fine and moving.

So I've got a couple of vague hypothesis floating around (could there maybe be and air leak on the return line) but as much as I HATE IT I think it's time to wave the tactical white flag ?

So if there's anyone fancy a them selves as abit of a pump builder and wants to earn a few quid (it doesn't need reselling just building and would please inform me where I went wrong that would be absolutely FANTASTIC otherwise if anyone's got one to sell that could also work.
Cheers for all the help guys