hi my td5 is playing up, starts normal works fine and then suddenly it wont start it wont even turn over and has to be bump started then works fine for a couple days then it happens again, ive changed my injector harness because there was oil coming through to the ecu so i dont think its that, any ideas? and then also my window wipers keep jamming and i had to nudge them to get them working again now they dont work parallel with each other do you think the mechanism is knackered?