Replaced those straps as well
It's almost certainly a "spark or fuel delivery" issue. The sudden engine shut-off IMHO points in that direction.
Look at each one (fuel, spark) independently and see which is failing and causing the engine to die. Once you know (spark, fuel), debug the devices and circuits that are involved.
From memory:
- Spark: reluctor / pickup in dizzy, ICM, ECU, coil, associated wiring (including the wire to the tach) and connectors
- Fuel: Relay / oil press switch, ECU, injectors, regulator, associated wiring and connectors
The service manual is your friend. Download a copy from here:
88-98 Service Manuals
Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...
www.gmt400.com
There are troubleshooting flow-charts galore, within, but they don't cover the elusive problems.
I asked you some other questions earlier but you didn't bother to answer them for whatever reason.
Good luck
Last edited: