I am having a intermittent issue with my 99 Dodge pickup where the engine will shut off. It starts back up again, sometimes it takes a minute or so before it will restart. If this happens while I am on the highway or going fast enough that the torque converter is locked, the engine will keep spinning even though it is dead. When this happens the tachometer still reads the accurate engine rpm. I know it's loosing spark and I am pretty sure it's either the crank sensor or the distributor pickup. Does anyone know for sure which one of those 2 parts provides the signal for the tach? If I knew the answer to that I would replace the other part. Thanks