What would cause the car to stall while driving?

The first step in any type of electrical diagnosis is a visual and physical inspection of wiring harness connectors to determine whether or not terminals are making good contact, or whether terminasl has been damaged or lack of connection. Your local Repair shop or Dealer should perform a diagnostic of your Computer control system, Fuel system and Ignition system and determine which system is causing your vehicle to stall.

Hello , starting with the basics , does your check engine light come on/// ??? if so what codes are stored in the computer,, obviouslly this is a heat related condition , so when the vehichle quits running you need to check for fuel pressure and spark to determine what system is failing,,, you are most likely dealing with a fuel pump issue or a igniton module...

Oxigen sensor.

your car is arching somewhere, there is either a crack in the dist cap or ignition coil. find the crack and patch it.