We tried everything relay fuse auxiliary pump the pump runs on turning ignition on but no delivery of fuel at filter ...open end of pipe even when cranking...something is stoping the pump

pump runs till glow plug light goes out but no fuel to open end of pipe after even when cranking...

even tried auxiliary inline pump linked to tank pump 12v supply....runs when ignition on then stops but doesn't deliver fuel to filter even when cranking and open end pipe at filter

no leaks and blend of 60/40 nothing at filter when cranking engine

no fuel when cranking not sure if filter was filled before fitting....

Yes Running veg oil

It's a 2000 year. BMW 2.5 diesel automatic

Hi I have a p38 2 5 diesel automatic the fuel filter was changed 3 weeks ago as it started to struggle after the change it ran for about 3 miles then started to struggle again ..looked at pipe and found air in the clear delivery pipe...I thought these were self bleeding..couldnd shift air ..took...