roasting coil wire

It's possible you may have hurt something in the MSD. I don't use MSD, so don't know much about what -- all sorts of wires are acceptable. You probably burned the wire out from the inside, which caused it to open, and that generates a huge high voltage just like lightning. That is, the ignition system, in normal operation, loads down the voltage because of the combustion process. If you have an "open" connection, this allows the high voltage to climb out of sight, and it can reflect back into the electronics and cause damage or failure.