Finally got to the point of starting my 73 Duster. 318, with factory ignition and ECU. I have a 4 pin ballast and also a 4 pin ECU. It only gets spark in the RUN position. Nothing in the START position. Am I missing something? I thought that a 4 pin ecu needed a 2 pin ballast, and a 4 pin ballast needed a 5 pin ecu. Any suggestions?