Stop in for a cup of coffee

Here is where it is strange distrib out turn it and good spark when on and also cranking, put it back in no good. Just made no sense did it numerous times. I was thinking during a load cranking but same good spark just when either was in no spark. Should not need a dist ground with a pickup but grounded it out also no change. Just a weird one. Got it just no idea of the cause told keefer to drive it close to home for a while (within free towing area) and see if it does it again if it does then I would prob throw a ecu at it.