Hi. My 2.0d has recently started running slightly rough sometimes, seems down on power, lurches when accelerating and seems to stall more easily. It doesn't do these things all the time, but often enough. My mechanic said there seems to be a fault with one of the fuel pressure regulators, but is unsure which one, and recommends I take it to a diesel specialist. A couple of days ago, after about fifteen miles, the glow plug light started flashing and the car cut out as I exited a roundabout onto