my xj6 2.7tdvi intermittent rough idle and low speeds

[lionel sams]

i have a 2007 xj6 2.7tdv.i I have now spent loads on it and still every now and then it plays up. cold or warm it runs rough. feels like only firing on 3 or 4 cylinders put your foot down and it stutters then exhilarates fine for a while.   put new egr valves in still the same then had the inlet manifolds changed and still no joy. Injectors have been checked and are ok. no air leaks changed diesel filter still the same  HELP PLEASE. 

[Alex Walker]

Hi , I have the same issue with my 07 2.7tdvi , any luck with solving the problem ?

I've spent  plenty on mine too and it's very frustrating  !