My 71 duster was previously converted to electronic ignition. I am have performance issues and could not figure it out, so i started looking at the ignition, i has a five pin ecu but 4 wires are not being used, strange. after a little research i found out the black and yellow wire go to the coil, and the two wire connection goes to the distributor. the only problem is my distributor only has one wire coming from it and it goes to the coil. Can somebody help me out and tell me what is going on.