Hi guys. I have a sept 02 320d e46 facelift. 3 weeks ago my car started to jerk and splutter and got a horrible diesel tractor like sound.Took it in to agents for a diagnostic. told me my injectors needed replacing. I took the car to a private garage removed the injectors and replaced them. replaced glow plugs as well. started the car same symptoms . !! they then refurbished the turbo at turbo clinic same symptoms. then the rail pressure sensor was. replaced. the knock noise is now gone . car starts drives perfectly. As it reaches 3000 rpm or if u floor it the dde light comes on and goes into limp mode. just wont boost. any ideas please. are my vacuum pipes maybe fitted wrong or what. I am at my witts end here now.I also had the tank flushed and cleaned professionally and the diesel filter replaced. It drives perfectly fine just wont boost. no smoke nothing .