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Unread 06-26-2013, 08:23 PM   #1
WoodyPL
Registered User
1996 ZJ 
 
Join Date: Nov 2012
Location: , New Jersey
Posts: 5
Dash vents don't

Air comes out the defrost vents perfect, but the dash vents barely work, some air comes out, but when i press on the gas it stops coming out. Can anyone help? My friend said it might be the blower motor but i think its a vacuum line.

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Unread 06-26-2013, 11:59 PM   #2
ZJBird
Registered User
1998 XJ Cherokee 
 
Join Date: May 2011
Location: Greensboro, NC
Posts: 34
+1 I also have this problem. Heat and air are good out of the defrost vents but not the front vents. Anyone?
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Unread 06-27-2013, 12:52 AM   #3
NewtoZJ
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1998 ZJ 
 
Join Date: May 2012
Location: Columbus, Ohio
Posts: 197
Mine come out of the dash vents, and nowhere else.
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Unread 06-27-2013, 01:10 AM   #4
kachink
Registered User
1998 ZJ 
 
Join Date: Sep 2010
Location: Lake Forest, CA
Posts: 505
Air from the defrost vents only is a classic symptom of a vacuum leak. The vent controls are vacuum operated and low or no vacuum makes it default to defrost.

You have high vacuum at idle and it drops when you open the throttle, which matches your symptoms also.

Cruise control is also vacuum operated, to that probably doesn't work either.
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