Vacuum and AC vents ..Question..
Thread Starter
Race Director
Joined: Jun 2001
Posts: 16,483
Likes: 1
From: The Only Corvette in Gila Bend, Az.
St. Jude Donor '09
Vacuum and AC vents ..Question..
I was wondering if I am having a vacuum problem. With the AC on, if I am cruising say 65 or 75, and try to accelerate any at all, the vents quickly shut down, and the cold air blasts my feet.
I know this is supposed to do this, but even the slightest pedal pressure causes this to happen. I thought it would have enough vacuum reserve to hold the dash vents open for the first 5 or 10 seconds.
I know this is supposed to do this, but even the slightest pedal pressure causes this to happen. I thought it would have enough vacuum reserve to hold the dash vents open for the first 5 or 10 seconds.
Racer
Joined: Nov 2001
Posts: 478
Likes: 3
From: Huntsville AL
Re: Vacuum and AC vents ..Question.. (Desertdawg)
I didn't really know it was suppose to do this, but I just went through my whole vacuum system myeself. There is no reserve on that system only direct manifold vacuum. I will be interested to hear from someone who knows about this also.
YBNormal...drive a vette
www.angelfire.com/al/swhite7/vette.html
YBNormal...drive a vette
www.angelfire.com/al/swhite7/vette.html
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
Re: Vacuum and AC vents ..Question.. (Ybnormal)
A friend on mine has a 82... there IS a vacuum reserviour. He had to replace it. It looks like coffee can. His developed a leak that gave him the same symtoms you described. He made one out of a coffee can.
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
Re: Vacuum and AC vents ..Question.. (Desertdawg)
I don't know if you have one but the early cars have a check valve in the main line to the vacuum canister so the lights won't start to come up and back down when you shut the engine off. You've seen cars do that I am sure.
Thread Starter
Race Director
Joined: Jun 2001
Posts: 16,483
Likes: 1
From: The Only Corvette in Gila Bend, Az.
St. Jude Donor '09
Re: Vacuum and AC vents ..Question.. (bluevetteman)
I'll look for one of those to, my headlights quit wroking (both failed at the same time) a few months ago. Could have been a sign of things going wrong....
Thanks, I will try to get a look at them today...
Thanks, I will try to get a look at them today...
