Hey guys. I own a 1969 Mustang Mach One and a strange thing happened where the engine would not shut off when I turned the key to the "off" position on the dash- the engine kept on running. I have an aftermarket universal wireharness from Haywire from Joplin Missouri and a complete MSD ignition system that includes coil, box and magnetic distributor. Anyway, the only way to shut it off was to unplug the pigtail where these set of wires connect on the ignition switch mechanism where the key is inserted on the dash. I also opened the hood and there was a bad smell coming from the starter solenoid. I have attempted to start up the car and all it does is just crank and there is no spark. What do you guys think happened?