Here's the procedure for displaying codes on that vehicle
Code retrieval can be accessed by the ignition key or by a diagnostic readout box(DRB).To obtain the codes using the key method,set the park brake,and put the vehicle in Park/neutral.
Some 95 and later OBDII vehicles, you may be able to retrieve OBDII codes with this procedure, if equipped with digital dash.
- Turn the ignition key ON,OFF,ON,OFF,and finally ON again(ENGINE NOT RUNNING)
- The codes will start to flash on the POWER LOSS or CHECK ENGINE light.
- FLASH,pause,FLASH,FLASH=code 12
Post any codes found here for interpretation but in the meantime when the engine dies, you need to test for
1) spark at the plug
2) Injecter pulse with a noid light
I know you said you checked fuel pressure, but did you do this at the time it wouldn't start. It's very possible for the fuel pump top be cutting out for a few different reasons like the pump itself overheating or a bad relay.