I have an 88 IROC 305 that shuts down when the outside temperature is hot and I am driving in stop and go slow traffic. ONce the car sits for about 15 minutes it will start up again. Once the problem starts it happens with more and more regularity until I let it cool right down. I can tell when it is going to shut down as it starts to run a little rough and hesitate when starting out but if I can get moving at a good speed the problem goes away. Its only in the slow stop and go traffic when its hot outside. I replaced the fuel pump as I thought it was weak but it didn't help. Any suggestions? This seems to be a common problem in these cars but no one seems to have a solution. Thanks.

 

I was going to say maybe you're overheating your ICM. But that wouldn't cause any hesitation or anything---it would just be sitting there/cruising along, and then just shut off...

Any check engine lights before it dies? And what happens after it dies, does it just continue to crank with no turning over under its own power? If you CAN, bring an ignition tester, or a screwdriver with you. You'd need a buddy to help you though when the car died, but have em crank the engine over while you clip the coil wire to the tester, ground it, and watch the spark. Or you can do it with a screwdriver by putting the end into the wire, then hold the metal on the driver close to a fender and watch for spark. Just don't hold the screwdriver anywhere but the handle unless, if your ignition is firing, you want a big old 40,000-some odd volt straight shot into your hand.

 

i'd check or replace the moduel