was under dash today. found 1 plunger diaphram that opens big air door back up above the gas peddle not getting any vacuum . traced orange vacuum line up to switch that controls air selection to vents' floor defrost etc. think bad selector switch my be the problem. there is like 4 0r 5 tiny color coded vacuum lines on the back of this switch. gone to junk yard tomorrow hope this is the problem ! will let you know !! thanks everyone Tim from Ohio

Please post this in your original topic so people can actually follow along.