Typically, when an ignition control module of this type fails it would be one of the three drivers (transistors) within it that controls a specific ignition coil giving up.

The reason: The placement of the thick film ignition (TFI) module placed too close to the engine block, causing the heat-sensitive module to suddenly fail when it gets above 257 degrees.

The Ignitor is the standard module that PerTronix has offered for years. The latest is the Ignitor II, which has adaptive dwell controlit senses coil energy and adjusts the dwell time accordingly ...