A/C vents
Instructor
Joined: Jun 2009
Posts: 109
Likes: 6
From: Scottsdale AZ
Enough for now. Let us know what year Vette and you will get more specific help.
Thread Starter
6th Gear
Joined: Jul 2014
Posts: 6
Likes: 0
Racer
Joined: Mar 2014
Posts: 253
Likes: 119
From: North Branch Michigan
Pull the rh plastic cover over the fuel rail. about 2/3 way back from the front you will see a vacuum port that comes out the side of the intake. There will be a plastic fitting that looks kinda like a pregnant T. One of the two lines out goes to cruise control diaphragm, the other to the climate control. They tend to turn to charcoal and break, causing the symptoms you desribe. If it is damaged, easy/cheap fix. About $6 at an Auto Value parts store. Just had the same issue on my '95. This fixed it. That other part mentioned earlier is not on the '95 or earlier models, and you have to stand on your head with a flashlight and mirror just to see it, so check the T I mentioned first.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The 1996 model year is famous for the collapsed rubber nipples in the HVAC programmer that cause the air ducts to not work correctly. The fix is to cut about 1/8" off the rubber nipples. I have also heard of people putting plastic tubing through the rubber nipples to keep them from collapsing. See this post, which shows the problem:
http://forums.corvetteforum.com/1580705187-post33.html
http://forums.corvetteforum.com/1580705187-post33.html
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Thread Starter
6th Gear
Joined: Jul 2014
Posts: 6
Likes: 0
The 1996 model year is famous for the collapsed rubber nipples in the HVAC programmer that cause the air ducts to not work correctly. The fix is to cut about 1/8" off the rubber nipples. I have also heard of people putting plastic tubing through the rubber nipples to keep them from collapsing. See this post, which shows the problem:
http://forums.corvetteforum.com/1580705187-post33.html
http://forums.corvetteforum.com/1580705187-post33.html
Instructor
Joined: Jun 2014
Posts: 178
Likes: 3
From: Pensacola FL
Its under the dash on the firewall above the accelerator pedal. It will have several vac. lines attached to it and its a real pain to get to. Might wanna take the drivers seat out and schedule an appointment with a Chiropractor before you start.