2001 JEEP LAREDO Engine And Engine Cooling Problems

FOR THE PAST YEAR MY 2001 JEEP GRAND CHEROKEE LAREDO LIMITED HAS BEEN OVERHEATING IF WE IDLE FOR MORE THAN 1-2 MINUTES. AS LONG AS THE RPMS DON'T GO OVER 2000 IT WILL HAPPEN. I WENT ON A TRIP LAST MAY UP A CANYON. DROVE ABOUT 50 MILES TO THE CANYON AND ALL WAS FINE. WHILE GOING UP THE CANYON SPEEDS STAYED BELOW 20 MPH BECAUSE WE WERE FOLLOWING MY IN-LAWS AND THERE WAS QUITE A BIT OF DUST THE AC WAS OFF I DIDN'T NOTICE THAT THE TEMPERATURE GAGE WAS RAISING. WHEN I NOTICED IT, I GUESS IT WAS TOO LATE. I STOPPED THE JEEP AND HOPED THAT IT WOULD COOL DOWN. AS I LIFTED THE HOOD. THE TOP POPPED OF THE COOLANT RESERVOIR AND SPRAYED COOLANT EVERYWHERE. I WAS ABLE TO GET HOME WITHOUT ANY PROBLEM BECAUSE I WAS GOING FAST AGAIN. I PUT MORE COOLANT IN IT...

MY 2001 JEEP GRAND CHEROKEE LAREDO HAS BEEN SHUTTING OFF WHILE I AM DRIVING AND ALSO SOMETIMES IT DOESN'T START PROPERLY. MY MECHANIC DOESN'T KNOW WHAT IS WRONG WITH IT. THIS IS THE SECOND TIME HE IS LOOKING AT IT. THIS HAS BEEN GOING ON FOR APPROXIMATELY THREE MONTHS. WHAT REALLY CONCERNS ME THOUGH IS THAT IT IS JUST SHUTTING OFF WHILE I AM DRIVING. THIS DEFECT MAY CAUSE A SERIOUS ACCIDENT WHILE I AM IN TRAFFIC. I AM SCARED TO DRIVE IT CAUSE IT IS HAPPENING EVERYTIME I DRIVE IT NOW. I DID FIND OUT ON THE INTERNET THAT THERE ARE OTHER COMPLAINTS OUT THERE AND THAT THE PROBLEM MIGHT BE THE FRONT CONTROL MODULE. I HAVE CALLED CHRYSLER TO FIND OUT IF THAT IS REALLY THE PROBLEM. NO ONE KNOWS ANYTHING ABOUT THIS COMPLAINT AT CHRYSLER. I JUST WANT ANSWERS SO THAT I CAN GET IT FIXED. I...