I have a 1994 3.4 V6 and Im having problems trying to fix the vents. I've read a couple thing off the internet but with no luck. I dont really know a lot about cars but Im working on it! What could possibly be wrong? And what would be the easiest way to fix them?

 

4th Gen LT1 F-body Tech Articles

That may be what you need to look at.

 

Replace the vacuum check valve. Over time they crack causing a vacuum leak. Does your car also kind of idle rough? it causes that also.When the vacuum system has a leak it tends to draw the air into your floor and windshield vents. It's a small black canister located up and to the left of your alternator. it has 3 lines connected to it. unplug all the lines(Carefully) and see if it's cracked or damaged. If so replace it.Here is the link to the check valve I bought.
93-02 Camaro Firebird Heat/AC Vacuum Check Valve NEW GM | eBay

 

thanks guys I will make a trip to the parts store sometime today and will get back to you and let you know if that worked! thanks again!

 

can you switch from floor to defrost or does it blow from both and not change.

 

If it's what im dealing with then he cant switch, just blows from both

 

Just put the valve on and my A/C blows perfectly and switches from dash to floor, etc

 

right i was trying to figure out if the vacuum leak is in the switch valve or the vacuum source like hose or check valve.

 

I replaced the vacuum check valve but that didn't work, the old one did have a small crack in it so maybe I have another leak somewhere? No I can't switch from floor to defrost, it just blows out both of them.

 

Thats odd mine works just fine, might be a dumb question but did you get the triple line valve? When I went to autozone they sold me the double line valve so i returned and ordered the triple