I have recently bought a 320d and the problem is that the injection pump (Bosch VP44) it's only injecting fuel on cylinder 1 & 2.
I have changed the injection pump body (mechanical part of the injection pump) and put on the car's original injection pump electronics on it and it still injects fuel on cylinder 1 & 2 just as with the old injection pump body.
I have even changed the injectors with working ones from my friends car. Still no difference.

I need some advice what to do.