It has a relay that disables spark and fuel when a sensor on the motor detects combustion gasses in the water, this system only usually cuts in after some driving but you could have a faulty relay, Rolls are good with wire colours so follow the wire colour from the fuel pump to the relays (I had the problem with a customers 1995, rolls were unhelpful so I had to do it the hard way!)
Hi my situation is same no fuel no spark not sure it has an immobilizer built in or not. I removed the battery for few days and changed the fuel rail hose due to leaking. After replacing it doest starts anymore but cranks. It is a Rolls Royce Silver Spur V8 with 8 coil packs fuel injection.
Thanks that helps my Rose Royce starts go dead may or may not start again
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