Hi there, yes please I have not received any assistance up to now.
No it's not a TDCi. It's the old common rail engine, one of the last in the 06 model. I have had this van for about 18 months had it regularly serviced with new filters oil etc, the reg for you info is BD06 ATO.
I have been using the van today. Goes fine for miles then for no reason sounds noisy and lacks power, I do a quick gear change and alter the revs and it's back to normal. It might do it again after a few minutes then might go for miles. I just need somewhere to start looking.
Well done Sean, looks like I am getting somewhere! I would just like to add, the problem only occurs when the engine is hot. Is this typical?
Thanks very much for all your help.