help 2.5tdi wont start went out this morning it turned over but wouldnt fire like no fuel, then it fired big cloud of white smoke ran 2 sec then died. started again and it ran but a bit rough took son to school and back didnt sound right, come out to go to the shops and now just starts run a few sec then stops. it doesnt get to idle revs. now i have been loosing water and being right on the edge of over heating. we have pressure tested the engine and it came back good on all 5 was about to do a belt and pump in case it was a circulation prob ive put a vid on photo bucket going to post a link if this works

any help would be very very very much appreciated

any help would be very very very much appreciated