i was disconecting my engien 2day geting ready for my swap im doing the same engien well zc sohc tell i do the gsr thing well my ? is on my head there is a plug and the other end is drilled it the head the part going into the head broke off and the plug with the wires riped off i unbloted my dizzy and found out that i could have unbolted that 2 so what is it i cant find it on the internet nor in my manuel im going 2 get pics of it 2marrow i will post them on here so i dont confuse u ne more but if u know what this is let me know thanx ps.... its on a d16a6 1991 civic si