Hi Guys, i had a phone call from my father who owns a 1998 300tdi ES discovery, he is having a slight problem and wondered if any of you gents had come across it. While driving along at 70mph it drives fine and rev's freely but when you approach traffic or a junction and let of the accelerator the revs suddenly die away it will just tick over and not rev and black smoke will come out the back!!! The only way to get it to rev again is turn it of and start it again and as you can tell this is pretty hairy when doing 70 :blink: This has only come apparent on long journeys not short distance ones any help is very appreciated