well i live in ca and we have stupid smog.. i just gt my xj and it came with a air intake (smog fail) so i just got a stock air box but cant figure the rear two vacum lines?


does anyone have a stock air box diogram? or can u fellas post pics (close ups) of ur stock air box and the vacum lines so i can tell were they all go...


thx


rob

 

the hole on the left side of the air box goes to the breather on the front of the valve cover

 

right, but i know that much. My main question is the two lil vacume niples on the back of the box.....

 

I don't know what year your box came out of and what changes may have been made, but on mine (1990) one one hose runs to the intake manifold in front of the throttle body and the other connects to the vacuum actuator that opens the preheat valve in the front of the air box. the pic is not the best but the yellow lines are the hoses and I think the one on the manifold is 3/16" on one end and 1/8" on the other, and the other is 1/8"

 

You can ignore the lines, they are for the little flapper at the front of the bottom half to operate a vacuum motor, those two are for a bi-metal valve, it operates by air temp,
on the vacuum fitting in the picture the red cap is the line that goes to the side closest to the engine



oh, didn't read all the way through trug's post he is right on

 

o ok so that helps so the front vacum canister line just runs to the back of the box? lol kool and the other one i have to find (so around the intake manifold)

 

well i just want to pass they might fail me if they see loose lines lol


so the one that is closest to the motor in the back is were ur red cap is? dumb wuestion does it go in for the red cap side or other side?


sorry for confusion...lol

 

The renix jeeps have this stupid emissions harness that that goes directly in front, but if yours was bypassed that is fine, the line runs from the red cap directly to the closest fitting and the outer most one is connected to the vacuum motor on the front of the bottom half of the air box

 

ill go mess with it rite now brb

 

from here, and the red one goes to the the red plug in my other pic

to here (Credit: borrowed the image from XJ?2010 off of this site thanks!)

 

man ur good lol one last question the motor breather one fatty goes to airbox or the one that runs along the driver side fender area?

 

are you talking about the one on the valve cover?

 

ya valve one now? goes to side one that runs along driverside fender to the firewall?

 

ohhhhh, the one along the fender well hooks up here
I know that isn't stock but the lines are unchanged
that valve breather goes to the back and the one on the fender wraps under the tube to connect to it

 

what year jeep do you have?