UK Car Repair: 1990 jaguar xjs v12, jaguar xjs v12, 1990 jaguar xjs

Question
car starts up runs good for about three Min. dies will not start back wait about two hours car will start back up then dies again after about three Min. need advice

Answer
Is this a Maranelli Ignition car - 2 separate coils? As it starts the ignition actually seems ok.  You first need to do a fuel pressure test with a gauge and ensure there is 30 to 40 PSI pressure constantly available. If so you then pull a plug and see if it has fuel on it or ios it dry. Next you have to pull a cylinder injector and  crank the engine