I'm thinking it might be hard to decipher if it is on "run" or "crank" in that split second when the key is being released from crank to run when there is the one spark. What I would do is pull the yellow wire off of the "ign" terminal on the starter relay to disable the starter (we know it cranks & no need to run the batt down for this testing) and charging the battery up with the alt causes system problems and have a helper hold the key to "crank" & see if the coil positive primary terminal and the blue/yellow ECU terminal is hot (the red/green terminal on an OE 5 pin ECU needs to be hot also) then release the key to "run" & see if everything is still hot. grab your meter.