Ford XG 4 Litre cranking but won’t start

Ford XG Ute 4 Litre

Problem:-

Engine cranks over fine but will not start

Cause:-

After many hours of testing close inspection on the oscilloscope a blip on battery voltage showed at cranking, the same blip was showing on distributor signal. The starter was removed & tested & found to be faulty, this signal was shutting the ignition system down.

Cure:-

Replace the starter motor.