An internal distributor fault could cause the Check Engine Light to illuminate, an engine misfire, or a stalling condition. Replacement of the distributor is commonly recommend to correct this concern.Google+
Car Problem Reports
Cadillac Fleetwood Internal Faults in Distributor Can Cause Engine Problems
Cadillac Fleetwood Problem
Visitor, 1996 Cadillac Fleetwood, 101,500 mi
My opti-spark distributor failed about 10000 miles ago. Its location under the water pump means that if the pump leaks, the distributor gets wet and quits. That's what happened to my car.