yea, take the black battery cable off for like 10 minutes, then put it on and let the car sit and idle for like 5 or so minutes, then take it for a little drive and see if its fixed. i could see why the car would stall if you put the stock air intake on after the other one you had on, cuz the airflow is more restrictive, thus its not flowing as much air as your other one was, and cuz your fuel maps had compensated for the extra air from the other intake. and when you put the other one back on after you had problems with the stock one, i think it stalled or ran rough cuz the ecu may have been trying to adjust its fuel maps and then you put the other one back on when it wasnt done relearning its stuff, so you basically confused the sh!t out of your ecu, hahahaha.