Does anyone know what stops fuel injection from working in a au. Motor try's to start but wont keep going.

Fuel pump dead,blocked fuel filter,are you sure its a fuel problem?
Cheers Johnny.

Yer it has a new fuel pump,have changed fuel filter, fuel regulator,crank sensor and cam sensor. I did put a tickford ho cam into a vct engine though. set no 1 on tdc and had rockers on underside of cam. That should be wright shouldn't it. Thanks Ray.