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Unread 04-04-2013, 07:46 PM   #1
gsnfl
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1988 YJ Wrangler 
 
Join Date: Apr 2013
Location: Plattsburgh, NY
Posts: 21
Name that vacuum port!

Sorry...new to this forum but I've come to like it for lurking purposes the bestest...

Weber-Nuttered 4.2 in an 88. I was cleaning up some vacuum lines and found this on the back of the engine near the firewall sucking away like a feind with nothing attached to it. Should it and to where?
Gracias!

mysteryport.jpg   mysteryport2.jpg  
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Unread 04-04-2013, 07:48 PM   #2
dancytron
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1990 YJ Wrangler 
 
Join Date: Jun 2008
Location: st. louis
Posts: 1,345
I believe that is the one that used to be hooked to the decel valve, which you don't have anymore. So you can cap it.

http://home.sprynet.com/~dale02/decel.htm
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Unread 04-04-2013, 07:52 PM   #3
gsnfl
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1988 YJ Wrangler 
 
Join Date: Apr 2013
Location: Plattsburgh, NY
Posts: 21
Ahhhhhh thank you!
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Unread 04-04-2013, 08:24 PM   #4
ctm
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1990 YJ Wrangler 
 
Join Date: May 2007
Location: Boston MA
Posts: 1,430
I thought that one is for the vacuum line to the heater control box.
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Unread 04-04-2013, 09:36 PM   #5
jamesbland123
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1987 YJ Wrangler 
 
Join Date: Jan 2012
Location: Newbury Park, CA
Posts: 62
Goes to the heater control for the passenger side vent. The line actually goes through the firewall to the heater vent control switches. If you don't plan to use the right side vent then just plug the hole. To get it working do some searches for heater vacuum control as there are other parts you might be missing such as a check valve and small vacuum line.
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Unread 04-04-2013, 09:48 PM   #6
gsnfl
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1988 YJ Wrangler 
 
Join Date: Apr 2013
Location: Plattsburgh, NY
Posts: 21
Isn't a jeep one big vent? That explains my pain below 10F!
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