My Jeep doesn't like 02 sensors... -
LinkBack Thread Tools
post #1 of 2 Old 09-19-2012, 10:35 AM Thread Starter
Registered User
1989 YJ Wrangler 
Join Date: Jan 2008
Location: Sarasota, FL
Posts: 349
My Jeep doesn't like 02 sensors...

I recently have been having trouble with my Jeep stalling out when the engine got warmed up.

Que89yj told me to unplug the 02 sensor and see if the problem persisted. That seemed to fix the problem, it idled for 20-30 minutes.

Got a new 02 sensor today put it in and it idled for 20-30 minutes without issue, then I took it out for a drive and it stalled out after a few miles. I unplugged the 02 sensor and drove around some more and it ran GREAT!

Why does my Jeep run better with no 02 sensor than with a brand new one?

Is it a bad idea to run it without the 02 sensor hooked up? Will it cause issues in the future? I live in FL so state testing is not an issue.

FYI I disconnected my EGR and plugged the holes, not sure if that is causing any of my issues...

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Sarasota Jeep Club
GatorsUF is offline  
Sponsored Links
post #2 of 2 Old 09-19-2012, 11:22 AM
Registered User
1993 YJ Wrangler 
Join Date: Feb 2011
Location: Tucson
Posts: 472
Not sure if it is different because you have a 89 and my 93, but I had this exact same problem. I would drive after a bit and the engine would buck and sound like it would back fire when I put my foot on the accelerator after installing a new o2 sensor (my old one's wires were cut, so basically drove with no sensor for about a year.) Well my problem was that that the harness's connecter to the sensor, which has 3 wires I believe, one of which was chewed/cut. Here's a picture:

I just cleaned the wires from the rubber insulator and sautered them back together. It drove fine after that. I would would look to see if your wires are all in good shape. It's an O2 sensor problem because the only variable you changed is the sensor.

My 5.2L V8 swap and Jeep build:
Rynfw100 is offline  

Quick Reply

Register Now

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

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


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

Email Address:


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

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Who makes the o2 sensors for jeep wayfastwhitey44 TJ Wrangler Technical Forum 6 01-05-2011 05:09 AM
My Jeep doesn't activate sensors at traffic lights? ETCMSSJoe Wrangler General Discussion 41 01-01-2011 03:00 AM
Jeep doesn't want to run when hot Srhmn8r TJ Wrangler Technical Forum 6 07-31-2010 04:13 PM
MPG - Jeep doesn't seem to take it seriously tecumsa TJ Wrangler Technical Forum 24 09-01-2007 09:23 PM
Parking Garage - Sensors not detecting Jeep? msavard TJ Wrangler Technical Forum 47 12-28-2006 11:03 AM

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