Perhaps the A/C is drawing too much power from the engine, could be the engine is idling too low.
why 2003 ford focus stall when air conditioner is turned on
bad starter, or solenoid
A faulty A/C compreesor can stall the engine
You need to check the idle control valve, and the air filter.
An air conditioner should not smell like smoke when turned on (or when turned off). I would have to suspect that the electrical insulation is burning.
I would check alternator.
The 1999 Saturn S-Series engine heats up the coolant, the thermostat valve opens and the coolant circulates between the radiator and the engine. Then the radiator fans turn on to cool it back down. The fans are also turned on when the air conditioner is turned on to aid in cooling the radiator and the air conditioner condensor.
Blower fan relay is stuck or fused contacts, replace it
it forgets what u last did! and there is probaly something wrong with your computer....
because you have too many dead babies in your air conditioner tank
ithe compressor is ran off of the belt, along with the fan and alternator, power stearing and when turned on puts an extra strain on the engine. This is more noticeable on a 4 cylinder than a v6
Just like you did the first time before you turned it off.