1994 Buick Regal engine quits, but key restart is no problem

[Norm_Wain]

I have replaced: Fuel Filter, Fuel Pump, Fuel Injection Coils, had Fuel injector cleaned, replaced Spark Plugs, to eliminate engine quitting, but engine still quits occasionally and is not related to weather or temperature, speed, road conditions, or angle of road traveled, and comouter analysis does not find cause as electrical