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Have a 1985 El Camino Choo Choo Custom SS which is bone stock. Searching as to why the AC Vents don't work, I found the vacuum controlled flap not opening so the AC isn't directed out to the AC Vents.

Several color vacuum lines coming from heat AC control. Ive noticed I'm not hearing any vacuum as the different setting are moved on the control. only the mechanical heat defrost is working.

Unless there is some obvious issue with these Heat AC controls? What color is the main vacuum feed to the Heat AC control. I want to see if I have vacuum there first.

Thanks,
Bob
 

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welcome Bob
x2 Rich
see if you have vacuum in / out of the Vacuum ball [vac reservoir ]
should be 3 lines under the hood, they get brittle and crack/break..
to the pass side Vac Ball from the engine, usually black.
from the ball to the control panel, purple.
from the control panel to the heater valve in the heater hose, grey.

I use vacuum hose or nylon oil pressure tube to replace them..

its usually a real good idea to check all the vacuum hoses on the motor
on these old Elky's they get hard and crack too..
 

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Well guys. I checked the vacuum ball, it was fine. I looked at every vacuum hose. Saw nothing obvious? But, I ran my hand along the vacuum hose behind the distributor and up against the firewall. As I pushed on the three way junction I heard a slight hiss. I replaced two of these vacuum lines. One going to the inside through the firewall, and the other to the cruise control.

Checked for proper operation. All works like it should!

You two are awesome! Thanks for showing me the right path to follow. It certainly saved me a ton of time!! Experience and wonderful advice saves the day yet again!

Thanks so much,
Bob
 

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wtg Bob
wtg getting hands-on it.. just lookin at it don't work very much..

I had a very small leak on the F350, everything still worked,
but the vacuum pump kept kicking on all the time..
I could not find it without blowing cigarette smoke thru the supply line,
took 3 seconds to find it.. and a minute to fix it..
it sits a week now and don't need the vacuum pump ..

thanks for the update..
 

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I would go with a stock style clutch fan.
A flex fan can be a bad news for people and engines.
When they fail they can do a lot of damage.
 
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