cat question - JeepForum.com
 
LinkBack Thread Tools
post #1 of 5 Old 03-07-2013, 07:57 PM Thread Starter
ZJPunk98
Registered User
2002 WJ 
 
Join Date: Oct 2005
Location: North Kingstown
Posts: 2,351
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  
Sponsored Links
Advertisement
 
post #2 of 5 Old 03-07-2013, 09:27 PM
04Overland47
Senior Member
 
04Overland47's Avatar
2004 WJ 
 
Join Date: Sep 2011
Location: Colonia
Posts: 888
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 127k miles / Powerstick Muffler / Superchips / Bilstein HD's / Addco Rear Bar / SOLD!
1998 ZJ Limited 5.9 SOLD!
2010 WK Laredo 5.7
1999 WJ Limited 4.0

Youtube Channel
WJ Thread
04Overland47 is offline  
post #3 of 5 Old 03-07-2013, 09:32 PM
Sweetjackal
Registered User
1999 XJ Cherokee 
 
Join Date: Dec 2007
Location: St. Pete, FL
Posts: 185
If the pre-cats do have O2 sensors just get an O2 simulator and eliminate them. They dont do much.

99 XJ SOLD
00 WJ Rust Bucket SOLD
01 WJ 4.7, 247, Zone 4 Lift
Sweetjackal is offline  
post #4 of 5 Old 03-08-2013, 12:35 PM Thread Starter
ZJPunk98
Registered User
2002 WJ 
 
Join Date: Oct 2005
Location: North Kingstown
Posts: 2,351
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  
post #5 of 5 Old 04-14-2013, 08:45 PM Thread Starter
ZJPunk98
Registered User
2002 WJ 
 
Join Date: Oct 2005
Location: North Kingstown
Posts: 2,351
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

Tags
cat , exhaust

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome