Vets can chim in if Im wrong but once it dies again try to narrow down what it might be. I doubt its fuel related becuase when the fp is dead its dead.
Try this once it dies with out warning, remove the plug from the opti thats connected to the coil. So its should be connected to the coil. Have it dangle next to something metal, the Water pump should work. Attempt to crank you should hear sparking.
If it checks out good, plug back to the opti, now remove a wire from a sparkplug let it dangle close to something metal listen for spark. If no spark you have an Opti issue more than likely.
If you didnt get spark at the coilwire connection it could be either the coil or ICM.
Also doesnt hurt to check all elec connections related to ICM Coil and Opti.
1995 9c1 Impala Clone
Last edited by Henry '06; 02-26-2013 at 03:28 PM.