Rebuilt engine new parts, from Atlantic British, they don't have a answer, discovery starts up great idling great all 8 cylinders firing all 4 coils firing , then all the sudden 2 coil loose their trigger signal then the discovery is running on 4 cylinders , new crank position sensor , if the crank sensor is bad I would Loose all coil triggers , also new computer same problem, PLEASE HELP, the info I have on cam position sensor is that it triggers the injectors only,