Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Jeep Tech
GL4x4 Live! GL4x4 Casino







Search
Reply
 
Thread Tools
Old June 7th, 2013, 09:42 AM   #1
Catnip 0_o
Martial Artist
 
Catnip 0_o's Avatar
 
Join Date: 10-14-10
Location: Roseville, MI
Posts: 371
iTrader: (2)
Mentioned: 0 Post(s)
Default Pre cat flange stud loose & o2 replace

2002 TJ 4.0L

Hello all,

I decided to replace my O2 sensors (both pre cat) yesterday because they haven't been changed in a real long time I'm sure and I have noticed a slight dip in gas mileage. When I went to install the sensors the rear O2 came out easily but the front has yet to come out, letting it soak in PB blaster for a few days..

Well while I was under there I noticed that the flange studs that hold together the precats were very loose, but I never had any codes come up on my CEL except for a large emission leak code that I got like a year ago and randomly went away, maybe this was the cause..? Regardless the studs were loose so I tightened them all and managed to get the rear o2 installed.

Well when I started it up, I don't have any CEL or difference in performance but I can hear a new noise under the hood now. Almost like a puttering noise and it seems to be coming from where I tightened the studs.

Has anyone else had this issue or know why I might have a noise now that I tightened the studs but before I tightened them I had no noise?

Thanks
Catnip 0_o is offline   Reply With Quote
Old June 7th, 2013, 10:14 AM   #2
firehawk
Live Action!
 
firehawk's Avatar
 
Join Date: 10-02-07
Location: Clawson, Michigan
Posts: 12,288
iTrader: (44)
Mentioned: 6 Post(s)
Default

Sounds like an exhaust leak?

Might have to take that connection apart and replace a gasket or doughnut.
firehawk is offline   Reply With Quote
Old June 7th, 2013, 11:58 AM   #3
Catnip 0_o
Martial Artist
 
Catnip 0_o's Avatar
 
Join Date: 10-14-10
Location: Roseville, MI
Posts: 371
iTrader: (2)
Mentioned: 0 Post(s)
Default

Quote:
Originally Posted by firehawk View Post
Sounds like an exhaust leak?

Might have to take that connection apart and replace a gasket or doughnut.
How much fun will that be?
Catnip 0_o is offline   Reply With Quote
Old June 7th, 2013, 11:59 AM   #4
firehawk
Live Action!
 
firehawk's Avatar
 
Join Date: 10-02-07
Location: Clawson, Michigan
Posts: 12,288
iTrader: (44)
Mentioned: 6 Post(s)
Default

Quote:
Originally Posted by Catnip 0_o View Post
How much fun will that be?
With martial art skills I am sure it will be a breeze.
firehawk is offline   Reply With Quote
Old June 7th, 2013, 03:59 PM   #5
Catnip 0_o
Martial Artist
 
Catnip 0_o's Avatar
 
Join Date: 10-14-10
Location: Roseville, MI
Posts: 371
iTrader: (2)
Mentioned: 0 Post(s)
Default

Quote:
Originally Posted by firehawk View Post
With martial art skills I am sure it will be a breeze.
Lmao
Catnip 0_o is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Jeep Tech
Thread Tools

Posting Rules
You may not post new threads
You may not 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

Forum Jump



All times are GMT -5. The time now is 01:53 PM.


Powered by: vBulletin, Copyright 2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2005 - 2012 Cracker Enterprises - Powered by Linux
vB Ad Management by =RedTyger=
Page generated in 0.07639 seconds with 20 queries