I have a few issues with my A/C and believe they are vacuume related. Which tube is the vacuum supply for the a/c-heater control ****? I took it out of the dash and could not feel any vacuum from any of the hoses. Also, where does the vacuum line penetrate the firewall? Thanks for any help!!

Kip

 

Maybe someone will answer this one, Where is the cool air hot air door at??

 

If you are talking about the hot/cold air blend door, it's not controlled by vaccum, but an electric actuator under the HVAC box. It is right above the passenger's feet just to the left of the blower motor. You can get to it very easily by removing 2 or 3 screws and unplugging the connector. If the problem is not the actuator, but the door itself, you will have to pull the entire box out which envolves evacuating the a/c system.

 

Well, I went and got a vacuum pump/tester, and just started testing vacuum from the pump and proceeded on back. I found the vacuum hose that goes along the firewall and makes a 90 degree into the firewall had a burn from the turbo. That is where I was losing all my vacuum. Problem solved.