The inductive pickup should just work, the spark plug voltage isn't dependent on the primary voltage.
Are these plug wires shielded? You might try swapping the plug wire with another one. Try the one that worked. Why are you using steel cored wires? You actually want some resistance in the plug wire so standard cores probably work better.
Last edited by 4ontheFloor; 01/14/2008 6:06 AM.
