cat question - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > cat question

Dan's Old as Dirt Birthday Sale!Premium LED Lighting by VISION X, Proudly sold at ROCKRIDGGEARSHADE Pocket Tops in stock and available at ROCKRIDGE

Reply
Unread 03-07-2013, 07:57 PM   #1
ZJPunk98
Registered User
2002 WJ 
 
Join Date: Oct 2005
Location: North Kingstown, Rhode Island
Posts: 2,055
cat question

Hi guys,

Looking to replace the entire exhaust system on my 02 overland 4.7ho which has the two cats located on the down-pipes and main cat before the muffler. Are the cats on the down-pipes necessary or can they be left out with my new install? I would like to remove those or the inline cat located before the muffler. Your input please. Thanks

__________________
Erik

98 ZJ 5.2L JGC Limited Sold
02 4.7L HO JGC Overland
ZJPunk98 is offline   Reply With Quote
Unread 03-07-2013, 09:27 PM   #2
04Overland47
Senior Member
 
04Overland47's Avatar
2004 WJ 
 
Join Date: Sep 2011
Location: Colonia, NJ
Posts: 749
Removing either of the two pre-cats would trigger the check engine light. Most people just leave them alone. Check to see if your main cat has an O2 sensor on it (I've heard some WJ main cats have them and others don't). If it doesn't then you can cut that out, if it does then go for a Magnaflow hi-flow cat. Just my 2 cents!
__________________
2004 WJ Overland 4.7HO Graphite ~116k miles / Powerstick Muffler / Superchips / Bilstein HD's / Addco Rear Bar / 17" Moabs
1998 ZJ Limited 5.9 SOLD!
2010 WK Laredo 5.7

Youtube Channel
WJ Thread
04Overland47 is offline   Reply With Quote
Unread 03-07-2013, 09:32 PM   #3
Sweetjackal
Registered User
1999 XJ Cherokee 
 
Join Date: Dec 2007
Location: St. Pete, FL
Posts: 161
If the pre-cats do have O2 sensors just get an O2 simulator and eliminate them. They dont do much.
__________________
99 XJ Classic - SOLD :(

00 WJ Limited - 4.7L Quadra-Crap, 3" IRO lift kit, JK Sahara 32's. Urban Wheeler / Daily Driver
Sweetjackal is offline   Reply With Quote
Unread 03-08-2013, 12:35 PM   #4
ZJPunk98
Registered User
2002 WJ 
 
Join Date: Oct 2005
Location: North Kingstown, Rhode Island
Posts: 2,055
I am familiar with the Magnaflow hi-flow cat, as I used it on my 98 5.2 ZJ build. installing 02 simulators sounds nice but i foresee problems in the future with those. Thanks for the help.
__________________
Erik

98 ZJ 5.2L JGC Limited Sold
02 4.7L HO JGC Overland
ZJPunk98 is offline   Reply With Quote
Unread 04-14-2013, 08:45 PM   #5
ZJPunk98
Registered User
2002 WJ 
 
Join Date: Oct 2005
Location: North Kingstown, Rhode Island
Posts: 2,055
Quote:
Originally Posted by Sweetjackal View Post
If the pre-cats do have O2 sensors just get an O2 simulator and eliminate them. They dont do much.
where would you get these simulators and do you know anyone running them? If so, what has been their experience?
__________________
Erik

98 ZJ 5.2L JGC Limited Sold
02 4.7L HO JGC Overland
ZJPunk98 is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.