ok guys here u go. hope it helps.

 

Where does the vacuum for the vent **** come from?
mine quit working..........no more pssssssssssssssssss when i turn it off..
i think i have a vacuum leak
somewhere

 

under the hood there should be a hose coming from the wiring harness on the passenger side. it hooks into the intake manifold on the passenger side next to the vacuum line for the fuel pressure regulator.

 

Do you have any pics, I've searched on here and came up with nothing........
thank you

 

I changed my ac relay and now all the vents except the 4 main rectangle ones blow cold. The 4 main vents you can feel that there cold but can hardly feel any air being pushed through.

 

on the 3.4 the vacuum is at the rear of the intake manifold, center and top. hooks into a vacuum fitting that has a larger hose and smaller hose on it. the one u want is the smaller vacuum goes into a wiring harness and should be the only one that does.

 

An air conditioning workshop can put their pressure gauge on the fill point and check the pressure running and stopped to confirm that the system is full and the compressor is working.

If the system is full and the compressor is working, maybe the expansion valve is blocked, or open too far.