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...

Rebuilt Engine all new part from Atlantic British , No One has a answer, PLEASE HELP. Engine starts up first try runs great at idling . the Disco has 4 coils each coil fires 2 cylinders the ECM fires all 4 coils at idle , THEN all at one the ECM only fires 2 coils which runs only 4 cylinders...