I have a 79 wagon, the #1 spark plug is not firing, I have replaced all the plugs, wires, the distributor cap and rotor, voltage regulator, the ignition module (it melted) and tried switching wires but the #1 plug still does not fire. Since the module melted I figure there must be something causing that and maybe is why #1 is not working. I am not running it any more until I get some idea on what to do, don't want to melt another module. Any ideas?