A/C vacuum problem - need diagrams
Thread Starter
Drifting
Joined: Jun 2003
Posts: 1,510
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From: Life moves pretty fast... if you don't stop and look around once in a while, you could miss it!
CI 6-8-9 Veteran
A/C vacuum problem - need diagrams
I believe that I have a problem with the vacuum that controls the vent door on my A/C. I've read a number of threads regarding this problem, but was wondering if anyone has any of the factory diagrams/or pics showing the location and process for checking and fixing this problem. Thanks for your help. Zuti 
Pro
Joined: Sep 2000
Posts: 703
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From: Cowtown
Zuti,
Take a look at these two:
http://webpages.charter.net/bshadel/...uum%20tank.jpg
http://webpages.charter.net/bshadel/Misc/diagnostic.htm
I just repaired my vacuum lines over the weekend. System works great now.
If you need additional help, please send me an email at bshadel@charter.net and I will be happy to help as best I can.
Bryan.
Take a look at these two:
http://webpages.charter.net/bshadel/...uum%20tank.jpg
http://webpages.charter.net/bshadel/Misc/diagnostic.htm
I just repaired my vacuum lines over the weekend. System works great now.
If you need additional help, please send me an email at bshadel@charter.net and I will be happy to help as best I can.
Bryan.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Your problem stems form the fact that you have no vacuum to the HVAC vent door controlers. The vacuum for all of the C5 vacuum systems comes from the back of the intake manifold here:
The vacuum line is constructed of a small black nylon tube that connects to that fitting with a rubber 90 deg boot. From there it enters one of the main wiring hanesses and then goes down to the vacuum tank in the passengers foot well.
You can use a mirror to inspect the intergity of the intake manifold connection. It is a ROYAL BITCH to get to without taking the manifold off!!
An acid leak fron the battery can and will eat up the vacuum line in the harness and can cause this condition. Also if the connection on the manifold or tank is off it will do the same.
Bill C
The vacuum line is constructed of a small black nylon tube that connects to that fitting with a rubber 90 deg boot. From there it enters one of the main wiring hanesses and then goes down to the vacuum tank in the passengers foot well.
You can use a mirror to inspect the intergity of the intake manifold connection. It is a ROYAL BITCH to get to without taking the manifold off!!
An acid leak fron the battery can and will eat up the vacuum line in the harness and can cause this condition. Also if the connection on the manifold or tank is off it will do the same.
Bill C
