hi colm, may i suggest that you log on to the x type forum as leo says and read posts that may relate to your issue. i have a 2.0d on a 04 plate. i have removed and cleaned my EGR valve, checked the turbo, along with the actuator, check all mass air sensors, full diagnostic report, air filter replaced, plus i also use an fuel additive, have some patience on this as when i brought my jag it too had some issues, but now all sorted and it runs ACE... good luck ... keep us all posted on your outcome. regards dave.