1993 Cadillac Sixty Special Dies Intermittently When Driving

I have a 1993 Cadillac Sixty Special. The check engine light comes on for a minute or two here and there and now the car has started to die abruptly as I'm driving. We pulled the codes and the ones showing are E27, E52 and E90. Can someone give me some idea of what might be causing it to die. Thanks.

- check that your battery cable connections are nice and tight
-while engine is running wiggle wiring and connector at the pcm (is engine stalling)
- also check that pcm connectors are tightly plugged in and locked

Troublecodes .net has the code explanations.