Hey -could use some help on this one. I got a 91 lumina 3.1L.(180K) It originally had a intermitent stalling problem last summer so had it towed to shop where they replaced the ICM and all was fine till now. The other day it randomly died going up a steep hill. Started right back up and ran fine. Now the problem has gotten slightly worse. It is totally fine when cold but when you drive it 20 minutes or so then let in set for 45 mins and try to start it. it starts and immediately dies. If you keep trying to start it , it will eventually starts up fine after about 6 cranking and starting up and then dieing episodes. I thought it was the ICM again so put a new one on and it was fine for afew days now it is stalling again. I did relearn the idle and it was running fine for afew days and now its back to doing the same thing except now it wants to stall at stop signs and idles too low, and surges at idle and starts to slightly miss. But if you shut it off for few minutes it starts right up and runs fine with no miss. This problem is getting worse everyday it seems but i am still driving it everyday to work 50 miles as the problems is only when it is warmed up . Could it be a bad ingecter, or coil pack?? It was just tuned up last year with new plugs and wires and fuel and air filters. And it runs like a top till you are idling and it is warmed up . Appreciate any help.