I have a 85 z28 iroc 305 carbureted car and I cannot figure out where this hose comes from or where it connects... It runs into the firewall so I cannot trace it back, can you guys help me as this is my first Camaro, I cannot blow air into it but I can suck air through it, must be one way. when the car is running no air is either sucked or pushed out from it so im not sure. please help

 

Did you pop the hood and just find it laying there? Do all your heat/ac controls work properly?

 

I Bought The Car And It Was Torn Apart, All The Vaccum Lines Were Unhooked Or cut So This One Was Propped Up Along The Firewall, The Heat Seems To Work But Not Sure On The Ac Because I Have not Put The Belt Back On, I Don't Think The Vents In The Center Of the Dash are Blowing When The Fan Is on But Thats All Ive Noticed As Far As Not working

 

Mmk, I think it has something to do with those vents not working, personally, but I'm not possitive where it should hook up. If you go to Austin Third Gen there are plenty of diagrams, vacuum diagrams included.

 

Is there a vacuum valve on the snorkel of the air cleaner it might go to?

 

YeahI Might Be Associated With Those But Im Not sure

 

I Got That One Hooked Up, I Believe All The Vacuum Is Hooked Up but this hose Im Just Not sure

 

The only two vacuum lines I know of coming thru the firewall go to the engine for vacuum to the A/C heater and the other goes to the heater control valve on the heater hoses. Did somebody do away with the heater control valve?

 

There is no heater control valve on an 85. That's gonna have to be HVAC control vacuum. Should go to a vacuum canister with manifold vacuum on the other port of it. Mine is mounted by the wiper motor.

 

Thanks, I wasn't sure

 

Still not Seeing A Spot To Hook It Up, The Hose Looks Like It Wants To Naturally Lay Over By The Wiper Motor

 

You can see the line hooked into the vacuum canister behind the master cylinder. If you don't have one you can hook it up to the intake manifold on the tee behind the carb, but you vent doors will work very slow, possibly not at all if you have low vacuum. You would be advised to get one.

 

Gotcha, I Definitely Don't Have That Cylinder, Ill Have To See If I Can Find One At A Junk Yard. Where Can I Hook It Up For A Temporary Fix?

 

Gotcha, I Definitely Don't Have That Cylinder, Ill Have To See If I Can Find One At A Junk Yard. Where Can I Hook It Up For A Temporary Fix?

 

Right behind the carb there is a port into the intake runner. Should have a tee or a nipple in it.

 

Okay Mine Only Has On Nipple Coming Out Of The Intake, Should I Just Put A Tee In Existing Line?

 

You can but it prolly won't work well. Go to a scrap yard and get a vacuum reservoir and a proper tee for best results.