corsa 1.3 cdti wont start??

bought the car filled with unleaded petrol, drained the tank fuel lines and rail filled with diesel after and still wont start, vauxhall say the fuel pump is lubricated by the diesel but... when u crack the nut from the injector it sprays out everywhere when cranking, it tries to start on easy start and also on tow in 2nd gear around 30mph real head ache!!!! done diagnostics check deleted old faults and only one the only one that wont dissapear is cam sensor, sounds daft but i havnt replaced it as yet as thought it would trigger the cam sensor if not starting? would the car still run with the cam sensor fault??? help please!