For you information, if a ballast resistor goes bad (goes open) the car will run while cranking, the monent you let you hand off the key and the ignition switch goes from (ignition 2, start) position to (ignition 1, run) position it will then die. The reason for this is when you are in ignition 2, you are bypassing the resistor completly and the switch is putting a full 12 volts (battery voltage) to the coil +. When you let off the key, the ignition switch goes to another set of contacts within itself (ignition 1). When it does this it then sends battery voltage to the ballast resistor which in turn sends a reduced voltage to the coil +.