Check your Air Conditioning / Heater Vacuum Check Valve. It located under the passenger side fuel rail cover. This plastic part break apart because of the heat of the engine over time. The vacuum tubes probably are just hanging next to this valve. I had this same problem and this was the part in question.
you have a vacuum leak check hoses, listen for leak on smaller hoses.vacuum controls the air that comes out of defroster , floor, or dash.
There are several good options in order to purchase Corvette floor mats. Some examples include "Auto Anything", "Amazon" or "eBay". Besides that also local Corvette dealers should be checked.
Water on the floor can be caused by a leaking windshield, a bad heater core, or a plugged drain line for the air conditioning condensation. If the water is warm when it comes out, or smells sweet, it is from the heater core.
Leaking windshield or clogged windshield cowl drain lines.
your switch cable might be broke you will have to remove your dash
yes
== == It's on the floor sometimes hidden by the carpet.
Water can get in when the firewall flashing is missing outside under the windshield cowling. The water gets into the heater/defroster system and then drains on to the floor.
look around the bottom of the seat their should be bolts leading through the floor board take those out (their should be 4 of them) and just remove the seat.
Answerwhich vacuum system diagram are you looking for? Let me know.....bogeygolf46@aol.com I have a 1978 Corvette with factory a/c. The unit works fine except it blows the cold air on the floor rather than through the vents. I know they is an actuator that controls this but I can not find it.
There is a foot switch on the driver's floor by your left foot.
Check for a vacuum leak or broken vacuum line first and if all is correct then you will need to check the a/c - heater controller..........