1998 4.0 sputter? - JeepForum.com
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 > General Technical Discussions > Engines & Drivetrain > 1998 4.0 sputter?

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: Jeep Fog Light LED Bulbs! Several Brightness Options! Black Friday is coming...Sign up for our Newsletter NOW!!!

Unread 06-26-2012, 01:03 AM   #1
Registered User
1998 TJ Wrangler 
Join Date: Jan 2011
Location: fruitvale, british columbia
Posts: 1
1998 4.0 sputter?

i have a 1998 jeep tj wrangler with a 4.0l and it sputters when the motors cold, but when it warms up it stops? i have changed the mapp sensor the catalytic converter the throttle position sensor and the idol position sensor! i need some help! maybe o2 sensors??

rileydeadmarsh is offline   Reply With Quote Quick reply to this message
Unread 06-26-2012, 09:50 AM   #2
Mishimoto's Avatar
Join Date: Apr 2012
Location: Wilmington, Delaware
Posts: 438
Do you have a check engine light on? Those will come on sometimes with bad O2 sensors, should be a P013x (x depending on what the location is of the O2 sensor). Have you tried pulling codes yourself using the KOEO method?
Mishimoto is offline   Reply With Quote Quick reply to this message

4.0 ho , engine problem , sensor , sputtering , wrangler tj

Quick Reply

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:
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.

Thread Tools

Suggested Threads

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.