The secondary resistance of three coils: 1985ohms for the two old one, 2650 ohms for the new one. New coil is higher than old one. Primary resistance all about 0.5ohms.if spark follows the coil, might be a clue here. clean all coil connections and grounds until shiny. you could do resistance tests on coils. takes maybe 1 minute for all 3. i'd pull the head and check for water intrustion with that old 3 piece exhaust!