[Ian Anderson]

Ron

I am not up on any MSD product so kick this into touch if it is far out from what a MSD system does and it does not use a coil or puts something different after it.

Some old Brit Cars (And most Jap Cars of the 80's era originated from these) had a coil with a resistor fitted.

On cranking a full 12 volts was fed in to the + side (Direct from the Starter connection) on crank but in normal run it went through the resistor dropping the pre coil to about 9 volts.

This was because during cranking the coil would not produce enough spark to fire. (Older batteries not giving enough to maintain the full 12 volts during the cranking for other ancilliaries / ignition)

So does it have one of these coils and is it missing the one wire?

Ian