WHY CAR WILL NOT IDLE PROPERLY.....

What is your question?

I have taken it to two Chrysler dealers and they have change all types of sensor...And when I leave the dealership it idle fine but 5 to 10 miles into driving and its hot...it stop idling.....I even drove it to Virginia from New York and took it in to a Chrysler dealer there and they suggest I change the throttle...after returning to NY I did just that and guess what...IT STILL WILL NOT IDLE PROPERLY...can anyone out there help me from experience not troubleshooting and guess work....Thanks