need help with a 04 4.0 -
LinkBack Thread Tools
post #1 of 2 Old 12-25-2012, 06:44 PM Thread Starter
Registered User
Join Date: Dec 2012
Location: Howell
Posts: 4
need help with a 04 4.0

Hey guys im new to the fourm, my niece has a 2004 Jeep Wrangler 4.0 that is having alot of problems. Doesnt start right now, i had to tow her home with my f250 today. I got the following codes from the Key on key off method..


i figure ill replace the alternator, the one injector and probably the coil pack...any idea?

JCPD2008 is offline  
Sponsored Links
post #2 of 2 Old 12-26-2012, 02:41 PM
Registered User
2004 LJ Wrangler 
Join Date: Dec 2011
Location: Norwalk
Posts: 776
Well those are a lot of misfire codes, 300 is multiple cylinder misfire, and then the 302 - #2, 304 - #4 and 305 - #5. As for the others I would google them to find out. Pull the plugs, check the coil. Start with the easy things first. What is the history of this thing?

-"I feel sorry for people who don't drink. When they wake up in the morning, that's as good as they're going to feel all day." - Frank Sinatra

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Mboelts 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

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