What is this?
CF Veteran
Joined: Aug 2008
Posts: 6,588
Likes: 495
From: Chico, CA
Year: 1986
Model: Cherokee
Engine: 4.3L with headers and full 3" exhaust system
It is an external air source for your catalytic converter. Just ignore it. Mine has one too. It is capped off and acts like it not there.
Senior Member
Joined: Apr 2009
Posts: 522
Likes: 0
From: Ontario
Year: 98' and 99'
Model: Cherokee
Engine: 4.0
I think its a cat warmer(not attached), when i went to buy my headers. they ask me if i had a Cat warmer, and they explained if you have a hose comming out of your cat, then its a cat warmer
CF Veteran
Joined: Jul 2008
Posts: 1,217
Likes: 7
From: Schnecksville, PA
Year: 94 XJ
Model: Cherokee
Engine: 4.0L
I am going to assume you are refering to the tube.
That is an A.I.R. tube.
This is for Cherokee motors that have an A.I.R. pump. Mainly the 2.5's and the 2.8's (Not ALL had them.)
A.I.R. pump pushes air (duh) into the cat to help burn off those unwanted fumes. Which ones? I have no clue.
If your XJ does not have an A.I.R. pump/system, do not worry.
That is why the manufacturer of this specific cat caps the tubes so they can market it for either model (kinda universal fit. almost)
That is an A.I.R. tube.
This is for Cherokee motors that have an A.I.R. pump. Mainly the 2.5's and the 2.8's (Not ALL had them.)
A.I.R. pump pushes air (duh) into the cat to help burn off those unwanted fumes. Which ones? I have no clue.
If your XJ does not have an A.I.R. pump/system, do not worry.
That is why the manufacturer of this specific cat caps the tubes so they can market it for either model (kinda universal fit. almost)
