alternator is brand spanking new. this is what i notice. when the ac compresser kicks on it damn near dies it idles below 500 when it kicks on. When i pull the ac clutch switch from ac compressor i start the car and run it in drive with parking brake on it doesnt want to die. Ac compressor is brand new. Also the whole upper half of the engine is new. Kinda wierd dont you think?
Have exhaust flow insp. could be a failing catalytic converter restricting the exhaust and choking the engine. Also, describe conditions of stall: Sitting in idle, while driving, or under a load or heavy acceleration?