Quote Originally Posted by jerry clayton View Post
running his fan load thru ignition switch on terminal lets the rotataing fan create a reverse charge circuit that fires the ignition
While this can happen when the car is stopped in extremely rare cases, the current produced by the fan rotation depletes rapidly when there is no power source (wind or other) to continue their rotation. And as this generating effects current is applied to the coil to run the car slows down so does the firing of the coil bringing it to a stop (usually quickly). Further, the load applied to the fans by the coil's demand acts as a brake to the fans as the load applied across a generator requires horse power thus lessoning their rotational speed faster.

Afterrun is usually caused by a hot spot in the cylinder, be it carbon or metal surfaces themselves, the heated area fires the fuel charge as it enters the cylinder causing a very rough and uneven continuation of the motor. It is a sign of other problems that need to be addressed and corrected.

And agreed, the guy needs to fix his electrical system as well.