overheating isn't necessarily the reason the car is stalling. on a 93 there are generally 2 things to check when you have the problem you describe. the ignition coil, and the coolant temp. sensor. after the car dies, remove a spark plug wire, install a spark tester and see if it sparks. if it doesnt you may need a coil. a scan tool is necessary to check the coolant temp sensor(not related to the guage on your dash by the way). just hook the tool to the car, have coolant temp spec showing on the data list while you drive. when the car is fully warm it should read about 190 degrees F. have someone drive the car while watching that parameter. if it drops to anything below 50 degrees F while driving after the car is fully warm, it will probably stall. meaning you need a new coolant temp sensor
Buy a thermostat and install it.
Most likely you have overheating, that's why the keeps running. You need to check the temperature control sensor and the thermostat.
The 2003 Toyota Camry coolant temperature sensor can be found on top of the engine. The coolant temperature sensor will be near the center of the exhaust manifold.
Overheating or air trapped in cooling system.
Is the secondary radiator fan coming on when the AC is turned on?
The intake air temperature sensor is located on top of the intake. In a 1990 Toyota Camry the air temp sensor assures the ECU the engine is running at optimal temperature.
It is located on the bottom of the radiator
There are multiple reasons for overheating including by not limited to:low coolant levelhead gasket is gonefaulty thermostatradiator is not working properlyfan has failed etc
Will a 1998 Toyota Camry motor fit in a 1999 Toyota Camry
Bad thermostat maybe?
overheating
Defective water pump.