Check engine light issue - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 09-21-2012, 08:31 AM   #1
Join Date: Jul 2012
Location: Aiken SC
Posts: 58
Check engine light issue

I have a 98 TJ Sahara 4.0 with 159,000 miles. Yesterday I noticed when I was stopped at a light at idle I could feel a slight pulsating from the engine. When I gave it the gas and the RPMs increased it went away. I also noticed that if I popped it in neutral that the pulsating stopped also if I pulled away under full throttle it never missed a beat. No skip, no hesitation just haul butt. That afternoon the Check Engine Light came on. I took it to two different auto part stores and both said it had a misfire #1 cylinder code. I bought the Jeep in July and do not know when the last tune up had been done. So I installed a set of Autolite AP 985 gaped at 0.35. The plugs I took out were the same brand and number as the ones I installed and they did not look old or burnt but to be safe I installed the new ones. The distributor cap and wires all look new also but to cover all the bases I cleaned the rotor and cleaned the contact terminals under the distributer cap, disconnected the battery and cleared the CEL. This mourning on the way to work the pulsating at the light is back everything else is the same with the exception of the CEL is not on, at least not yet. Now I know I may need to replace the distributor and wires and maybe the coil, my question is, what else can it be? I love my Jeep but if this gets too deep I may have to let it go. Any help at all will be appreciated greatly.

Sandlapper is offline   Quote Quick Reply

Quick Reply

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email 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

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 Off
Refbacks are Off

» Featured Product

All times are GMT -5. The time now is 01:54 PM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC