I have a 91 Corsica , It stalls when idling in park after 3 minutes. Also jerks when going down the road, and stalls when slowing down to a stop.

Would your fuel cap or breather on fuel tank be blocked

Radiator cooling fans not working? The ECM is protecting the engine by shutting it down.

there is a sensor that will increase engine revs when turning at slow speed , i expect this is the issue, to check get the OBD codes read to confirm

Plugs ,wires,coils.

THIS COULD BE A THROTTLE POSITION SENSOR (T.P.S.). IF THIS GETS WORSE THE WARMER IT GETS YOU MIGHT ALSO WANT TO CHECK YOUR COIL(S).

try cleaning or replacing the EGR valve? hope this helps

try doing the procedure below, should cure the problem.
Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Sounds the EGR valve and EVP sen is bad even if you tested it. The EGR valve cntrols idle and if carbon up will make the car stall or idle high and low (rpms going up and down) This was common on all cars during that time. I would say replace the EGR valve and senosr. This should take care of the problem. One more thing have the fuel pressure check on the car.

first check the air and fuel filter. you could also have a clogged catalytic convertor. do you smell rotten eggs? if so it's bad. good luck

sounds like the EGR valve is sticky, take a small screw driver and tap the valve when the engine is at idle and you will notice a change in the way the engine runs, if the vehicle smooths out disconnect the valve and drive the vehicle and it should not cut off please let me know and dont forget to rate me!!