Hey Guys, I have an 84 camaro Berlinetta and I am having issues with the AC duct diverter controls. When I have the controls set on the main vent setting, it seems to constantly blow out of the defrost and main vents together. Sometimes if I hit a bump or take a sharp turn it will switch over to the main vents like its suppose to haha. When I try to select the floor vent setting it switches to the defrost vents ugh. Could this be an HVAC switch issue. I dont hear any hissing and when the engine is off and I unplug the vacuum line from the manifold vacuum source, I can hear a quick suction sound so I know the line is holding vacuum. Just would like some leads before I open her up this weekend. Oh and its the digital starship dash configuration. Thanks!