Originally Posted by ray barker

allot of these faults similar to yours are curred by the black box on the turbo think its part of the actuator. Someone on ebay sells repaired ones that do the trick. Im not sure if a leak down test on those injectors get to the bottom of this its more of the program that runs them. There should be plenty of info on a mondy site its a very common problem. If you live near west cornwall go to helston deisel you would only need one visit