distributor cap catched fire

I was meaning that the cap and coil don't come with the strap, it is a separate part...

I was thinking on going MSD with my Accel SuperCoil, but still have my stock motorcraft module in my Jeep.

I will for sure pay attention to grounds seeing as I have a 'glass body.

Mike

Because you use the Accessory position of the ignition switch. That position supplies power to things like the radio and wipers in either the "Acc" or "Ignition" positions, but only to the accessories (and not the ignition) in the "Acc" position. The provision of an "Acc" position is to prevent coil burnout (and the wasting of battery power). There are separate contacts within the switch for the ignition and accessories.

In the "Start" position the accessories are disconnected to prevent damage to electronics caused by voltage spikes generated by the starter and solenoid. Take apart an old switch sometime and see how complex it can be.

Dan

My cars have ACC, RUN, and START. Not everything works in ACC on all cars. For example, wife's Beretta - digital dash, IIRC the dash only powers up in RUN.

Ray

That's actually NOT how HEI works. It is how Chrysler electronic ignition works, but there's a difference. With HEI, the module limits the coil dwell time. IOW, at low RPM or with the shaft not rotating, the HEI will only allow current to flow through the coil for a finite number of millseconds, and then shuts the coil off unless there is another pulse from the pickup coil. That's why HEI doesn't need a ballast resistor to protect the coil.