in 'run' i have 4.5 volts at the coil, if i bypass the ballast and run a jumper i have 7 volts at the coil, at the ballast i have 10 volts, and the battery has 12.5 volts..i dont know if thats not enough juice at the coil but thats the way its always been and runs just fine, just a b..ch to start after it sets for a while..I tried using 2 jumper wires straight from pos and neg at the coil to the pos and neg at the battery and cranked it, it wont fire the plugs like this for some reason.. unhooked the jumpers and tried cranking it again normally and they fire..