Steve thanks very much for that info.first thing i checked was injector leakage but and seemed ok as ihad seen that before on poor start symptoms,but after your message i checked again and sure enough one is leaking so i managed to blank off that injector pipe on the rail and i figured it should fire up on three,it does fire, which it wouldnt before ,but not on three cylinders as hoped?i have ordered one injector for tommorow hope it gets it running,will let you know,thanks for your advice everybody