OK, so I'm in even more need of help now... I took this to a friendly local garage, thats pretty trustworthy. He's had all the pipes off and swapped them over for clear pipes to check for air, which there is. He's tried replacing the pipes and its not made any difference. So i guess its not the leak off pipes :(
He's suggested taking it to a guy who has some proper diesel diagnostics software to run some tests, but now I'm wondering if i should just take it to the main dealer...
If its not pipes, I guess it would most likely be seals? But i find it odd that once its running its totally fine, no sputtering at all, drives smooth.
Anybody had any experience with this kind of thing? Can anybody help?
Thanks,