Ok last week get in car to start turns over won't start. A few more trys and it fires up runs great all the way home. The next day After running around town I jump and and dead won't even try to start. I check for spark nothing. So I get a new ICM for free brand new still dead. I pull the 2 month old opti generic brand and replace it with a new GM opti. Car fires up and I rev it a little and it revs irratic and then imediately dies. I do this agin a few times. Car just won't stay running for more then 6 seconds. I triple checked the wires and non are crossed. Wires are new. I whip in a new set of plugs. The only thing I can figure is the generic ICM that I got last week is no good. The car also smell very rich like its getting a irratic spark. its a 93Z ecm seems fine. I will check the fuel presure tommorow but I can hear the pump. Would the MAP ot TPS or IAC cause this? Tommorow I'am picking up a GM ICM. What else could it be? car is a stock 93 Z-28

 

I did a search on this already

 

my car had similar symptoms so i changed opti. turns out it was fuel pump, it to would start and run smelled rich, it got enough gas to run but not at high enough psi to run good, that my two cents , worth checking maby