Was cruising on the freeway Saturday...all of a sudden car starts to buck a little...backfires then dies...pull off to side...cranks but no start...get it towed home...check everything...fuses all look good...getting spark...injectors are pulsing...have fuel pressure so what's wrong??...turned the motor over and it tried to start...kicked a couple times but was backfiring a little...sounds like timing...pull the cam sensor cap and there's the problem...the screw holding the interruptor ring had backed out and the ring was just spinning loose under the cap...my question is why did the car die...I thought once the car was running the cam sensor was out of the picture...you can unplug the cam sensor and the car will keep running...explanations?