i revved mine to 4k rpm and it didnt die.. similar problem as yours.. sometimes it does that sometimes it doesnt.. kinda random.. i dont know why either.. i cleaned the IAC.. doesnt really help
It is hard to diagnose your problem without knowing what kind of vehicle you drive: engine, transmission, mileage, year.sorry to bump this but I've been having the same problem and its completely random, tonight when I left bestbuy it idled like crap but once I gave it gas it smoothed out but was fine. any suggestions?