-> The crank/cam sensors feed to the DIS module. -> Then the "normal" group of 4 wires lead to the ecm for timing -> control. The DIS module syncs the coils, and supplies the signal for -> SEFI ecms. Soo... where is this DIS module? Built into the coil pack base? -> I don't understand your one wire comment? How many wires does a distributor-type wiring harness have running to the HEI module? One?