i have an 86 camaro and my problem is that my cold and hot air seemingly has zero pressure unless im on the freeway. even then as if its just forced air. You cannot hear air blowing but you can hear the channels changing when you set the settings from say heater, to cabin, to passanger. Wtf is it?

 

sounds like you are only getting ram air-blower not
working,quite a few causes for that-anything from
blown fuse to bad blower motor.

 

I'm going to have to say your blower motor is shot.