2004 LJ Precat Failure - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 23 Old 08-10-2013, 07:09 PM Thread Starter
jermeyg
Registered User
2004 LJ Wrangler 
 
Join Date: Oct 2009
Location: Rosamond
Posts: 557
2004 LJ Precat Failure

With a P0420 code. I removed my cat system and saw that one of the precat honeycomb was missing. Since everything seemed okay I ordered a new eastern cat system (20379) off rock auto put everything back together and kept driving.
http://www.rockauto.com/catalog/rafr...&parttype=5808

Well eventually on my way back from Moab on the I-70 I lost power and couldn't go over 50mph. It continued to get worse because the exhaust was clogged. So after some gracious jeepers got our Jeep home I removed the exhaust and made this little video to show what I found. Hopefully it helps

*disregard the welds on the pipe near the flange I was setting the welder for the new cat system.

jermeyg is offline  
Sponsored Links
Advertisement
 
post #2 of 23 Old 08-10-2013, 09:36 PM
ckspeed
Member
 
ckspeed's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2011
Location: Malcolm
Posts: 139
Linky no worky....
ckspeed is offline  
post #3 of 23 Old 08-11-2013, 01:16 PM Thread Starter
jermeyg
Registered User
2004 LJ Wrangler 
 
Join Date: Oct 2009
Location: Rosamond
Posts: 557
Quote:
Originally Posted by ckspeed View Post
Linky no worky....
I am sorry about that. I think I finally got it fixed!
jermeyg is offline  
post #4 of 23 Old 08-11-2013, 01:28 PM
1982cj8
Registered User
2005 LJ Wrangler 
 
Join Date: Nov 2008
Location: Everett, WA.
Posts: 643
You always have to replace all 3 cats together. I purchased the eastern cats and removed the rear one when I did it, only the front cats are monitored so no check engine light and it runs better.

Always bring a compass, it is awkward to have to eat your friends.

4X4XNORTHWEST.COM
1982cj8 is offline  
post #5 of 23 Old 08-11-2013, 02:21 PM Thread Starter
jermeyg
Registered User
2004 LJ Wrangler 
 
Join Date: Oct 2009
Location: Rosamond
Posts: 557
Yep I replaced all three myself although I didn't remove the third one. I imagine it probably run a little better and cooler.
jermeyg is offline  
post #6 of 23 Old 08-25-2013, 08:13 PM
BMorrNH
Registered User
2005 LJ Wrangler 
 
Join Date: May 2013
Location: Exeter
Posts: 159
No way! I have a 2004 LJ, my dealership is trying to get $875 plus 2 hours for all 3, one piece. I have a local shop that wants $600 + 2 hours. Where can I buy my own one piece front pipe with all 3? It's rattling, I've noticed loss of power and poor gas mileage. Nothing alarming, but the front is rattling and check engine light is on and off every now and again.
BMorrNH is offline  
post #7 of 23 Old 08-25-2013, 09:04 PM
ckspeed
Member
 
ckspeed's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2011
Location: Malcolm
Posts: 139
Rockauto has them for around $300+/-

'04 TJ-6 - Work in progress....always
ckspeed is offline  
post #8 of 23 Old 08-26-2013, 04:06 AM
clayduster71
Registered User
2005 LJ Wrangler 
 
Join Date: Aug 2013
Location: Jonesborough
Posts: 64
Ebay $327.18

I bought the whole thing from Midwest Auto for $327.18 delivered on Ebay the other day.

http://cgi.ebay.com/ws/eBayISAPI.dll...m=350860795660
clayduster71 is offline  
post #9 of 23 Old 08-26-2013, 07:31 AM Thread Starter
jermeyg
Registered User
2004 LJ Wrangler 
 
Join Date: Oct 2009
Location: Rosamond
Posts: 557
I got mine at rockauto as well. So far so good!
jermeyg is offline  
post #10 of 23 Old 08-26-2013, 08:41 AM
gtospeeding
Registered User
2002 TJ Wrangler 
 
Join Date: Apr 2007
Location: michigan
Posts: 651
why not remove the cat material (gut it) and bolt it back up?
gtospeeding is offline  
post #11 of 23 Old 08-26-2013, 10:52 AM
vishrb
Registered User
2005 LJ Wrangler 
 
Join Date: Mar 2013
Location: oklahoma city
Posts: 76
just installed the eastern cadalytic as well. Purchased from Rock Auto also. Just one day out so no real thoughts yet. Initial quality seems good.
vishrb is offline  
post #12 of 23 Old 08-26-2013, 11:49 AM
J03_TJ
Registered User
2003 TJ Wrangler 
 
Join Date: Jul 2009
Location: Reno
Posts: 4,064
So I'm just curious, are you guys talking about a one piece item that contains all three cats and is bolt on? Or do you have to do some welding?
J03_TJ is offline  
post #13 of 23 Old 08-26-2013, 01:51 PM Thread Starter
jermeyg
Registered User
2004 LJ Wrangler 
 
Join Date: Oct 2009
Location: Rosamond
Posts: 557
The eastern cat is a two piece bolt on setup. They give you an exhaust clamp to tighten the precat to the third cat. You can choose to weld them together if you choose. Adjustments need to be made if you are running a raised skid plate of course.
jermeyg is offline  
post #14 of 23 Old 08-26-2013, 04:27 PM
vishrb
Registered User
2005 LJ Wrangler 
 
Join Date: Mar 2013
Location: oklahoma city
Posts: 76
Quote:
Originally Posted by J03_TJ View Post
So I'm just curious, are you guys talking about a one piece item that contains all three cats and is bolt on? Or do you have to do some welding?
Mine did not come with clamp. I had to buy one. but yes had all three cats. So far so good.

Can you diggit it, suckas!!!
vishrb is offline  
post #15 of 23 Old 08-26-2013, 10:44 PM
J03_TJ
Registered User
2003 TJ Wrangler 
 
Join Date: Jul 2009
Location: Reno
Posts: 4,064
Thanks. I have never been lucky enough to have a vehicle last long enough for cats to go out. Just thought I'd ask. Got another question for those that have experience with clamps. I cant help but go off of stories of clamps on exhaust coming loose, but don't really know if its hype or incorrect install reports. Does it matter that the clamps are up near the engine and probably the portion of the exhaust that gets the most vibration? Just wondering if clamps tend to work or they don't?
J03_TJ is offline  
Reply

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