first i had a suddern loss of power . And now it starts when cold just fine and runs like a dream apart from the loss of power until you turn it off. If its been running for over 30/40 mins and is hot it wont start again for at least an hour please can anyone help:bang::bang::bang:

Seen this problem before and it was a duff injector. Problem is which one. You need to get it on a computer. About 2 months after the problem was fixed the high pressure pump went down so beware this could be a costly one.