Originally Posted by RichieST
Take it to a proper diesel specialist. All the ford dealer will do is plug it in to the computer, see that there is no faults stored and then they are stumped.
If one of the injectors is leaking into the cylinder overnight, this would explain the symptoms.
I'd go with this advice. I did a year and a half in a dealer in between a career working for independent garages and no one there had a single clue about diesels. We've diagnosed stuff in the garage I work at now that dealers couldn't find. Had at least 3 cars in the last 6 weeks that had been to local dealers and they said there was no problems and we've found the problem. Dealers not always best option, try a good diesel specialist