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Unread 09-07-2012, 11:04 AM   #1
rob84044
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Join Date: Mar 2012
Location: fredericksburg, va
Posts: 13
Air Vents

Hello. I have a serious issue i feel.


To start off, only my face vents and my defroster vents will blow air thru them. None of the other options for the air veents will work.

Second off, whenever I start going about 40 miles an hour or higher ( whenever I start to involve higher gears, (it is an automatic) ) the air will go from the face vents to the defroster vents. And once I slow down or finally pass thru to the higher gear, the air will return to the face vents.



And now only recently the face vents arnt working. It is boggling my brain..

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Unread 09-07-2012, 11:16 AM   #2
PolkaPower
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1998 ZJ 
 
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Location: The Abyss, MD
Posts: 15,987
Sounds like it could be a vacuum leak. Check all of you lines under the hood. Just a guess though.
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Unread 09-07-2012, 11:26 AM   #3
rob84044
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What do these lines look like?
Are they the two tubes going into the fire wall?
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Unread 09-07-2012, 11:32 AM   #4
melk
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1996 ZJ 
 
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Location: Charlotte, NC
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The vents are controlled by vacuum pressure.

This vacuum line terminates under the battery tray, where it must be securely attached to the box.

I would check that first.

edit, the vac lines are small-diameter black rubber hose. They attach to the intake manifold. Trace back the one that goes along the firewall and passenger side fender to the box under the battery tray as I described above.
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Unread 09-07-2012, 11:58 AM   #5
mtsgsd
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1995 ZJ 
 
Join Date: Aug 2012
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I just fixed that problem my self. The hose was fitting too loosely at the vacuum reservoir under the battery. For some reason this is not a barbed fitting either. It's only about 18" or so of rubber hose that connects to a network of plastic lines, so It's a cheap fix too if that's the only issue.
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Unread 09-24-2012, 11:46 AM   #6
rob84044
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Quote:
Originally Posted by mtsgsd View Post
I just fixed that problem my self. The hose was fitting too loosely at the vacuum reservoir under the battery. For some reason this is not a barbed fitting either. It's only about 18" or so of rubber hose that connects to a network of plastic lines, so It's a cheap fix too if that's the only issue.
can u post a picture of which lines?

I will post a picture later tonight with something i think you all are talking about.
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Unread 09-24-2012, 12:07 PM   #7
Glasssplinter
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1994 ZJ 
 
Join Date: Sep 2010
Location: Farmington
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There was also a TSB on this that you need to add a check valve in the line that goes through the firewall to the climate control selector. This was the link someone else had posted

http://dodgeram.info/tsb/1996/24-01-96a.htm
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air , automatic transmission , firewall , speed , vents
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