When the fan is off and I try to get some “fresh air “, my vents has no (very very less, even I am driving at 80mph) air comes out. But if I open any window either passager’s or diver side (even ½ inch only) air start to comes out form the vent. Is it normal? I took it to the dealer after the mechanic took a test drive with me; he said that’s normal. But I don’t thing so. How about yours?

 

Makes sense. For air to come into the car it has to push air out of the cabin. If the cabin is sealed really well (as the Z's is) the incoming air cannot overcome the static pressure in the cabin. Crack the window, no more static pressure.