Against a decent loose range on pokerstove, QJ has 25.2% equity and that's in a best case scenario including QJ/JT. I think you are up against Q8s/KQ/set almost always here with more leniancy(sp?) to KQ. That gives you 16.4% equity. So once he 4bets the flop you should be getting out since you don't have the equity to be calling this.