I just replaced my heater core, evap, blower motor and what not. Before I did that, my heat barely worked, but I had an issue of only the two driver side windshield vents blow normal, but the two on the passenger side barely do.. So I took the dash off, replaced everything made sure all the vacuum lines were on everything, everything worked. So I fire it up and still the two passenger side vents don't blow much, heat works great now haha, but still not even air flow on the passenger side.. what could affect this ? Im stuck!!! Thanks guys.