vectra 2.0dti 2000-last week i stoped at a shop for 2mins and car wouldnt start since. iv had the car fault codes read saying faulty fuel injection pump,so purchased a 2nd hand one with exactly same numbers onit, still wont run, then noticed a sump full of deisel so then changed the four injector seals still no joy,so any1 out there with advice pls