Salam all, i have vitz 2014 model, it makes dug dug dug sound from exhaust if ac is on. I cant hear it if i am inside car while car is idle. But if i come out or open door i can hear it clearly its very loud.. if i stop ac then there is no sound. Also if i drive car with ac on i can hear that sound inside as well like some airplane is going over head.. please guide what is solution. Thanks in advance.
