Hi, I own a 2008 B7 2.0TDi 170 S-Line SE quattro avant with 77k on the clock and it's not running too good. This may not be relevant, but a couple of months ago I had the timing belt replaced at 75k and it also had injectors replaced under a recall (main dealer did the work). A couple of days after the work it started juddering under acceleration at about 3k revs but could live with it as try to drive it economically whenever possible. But the problem has slowly worsened, appearing lower down the rev scale, and today it alarmingly refused to go over about 1k revs when I pulled out onto my main road. There are no warnings coming up on the dash but I've booked it into the dealer for Friday. The car has been dogged by these kind of problems since I bought it new. I've had gas and exhaust pressure sensors replaced after repeated power failures but warning lights came up on the dash for these issues and this time there's nothing. I've checked through my service history and it doesn't look like the fuel filter has ever been replaced. The car does seem sensitive to fuel (I've got a local indie garage and the the car seems to run worse if I fill up with diesel from there compared to a big name station) so I'm wondering if it sounds like a fuel supply issue? Any thoughts? If it sounds like a filter problem I might do it myself but realise it could be a multitude of things.