help jeep misfiring! -
LinkBack Thread Tools
post #1 of 4 Old 09-16-2013, 07:31 PM Thread Starter
Registered User
2003 WJ 
Join Date: Jun 2011
Location: milton
Posts: 75
help jeep misfiring!

So my jeep was running rough, 03 4.7 130 k on it and I was thinking maybe it was just a bad batch of gas because I just filled up this morning then it got worse and now I'm throwing a p0302 cylinder 2 misfire idk what to do my plugs are recent maybe 10 k ago replaces with champion platinum I believe.. And advice? Do you think that it could be a bad tank of gas?

2003 4.7 quadratrac II 120k bone stock for now :)
Dana 30/186MM Front Axle
3.73 Rear Axle Ratio
Dana 44/226MM Rear Axle
kharney is offline  
Sponsored Links
post #2 of 4 Old 09-17-2013, 12:46 AM
Registered User
2000 WJ 
Join Date: Sep 2012
Location: Roseville
Posts: 728
Clean your iac. Plenty of threads on that. Also YouTube videos. See if that helps.

There might be a way to do a homemade smoke test to check for a vacuum leak.

Could be a lot of things though, search function on the forum is a huge help in these cases.
doorjamm is offline  
post #3 of 4 Old 09-17-2013, 01:58 AM
Registered User
1999 WJ 
Join Date: Jul 2011
Location: Las Vegas
Posts: 153
Double check your plug to make sure it's not fouled. Swap the #2 coil with a coil from another cylinder. Clear your codes. If the code jumps to the cylinder you swapped coils with, your coil could be bad.

1999 WJ 4.7, 242HD, IRO 4" Long Arm, IRO Adj Track Bar, JKS BPE, JKS Quick Disco, 15" Cragar D-Window, 32" BFG KM2, V3 Projectors, DDM Tuning 55w 5k HIDs
perfeng702 is offline  
post #4 of 4 Old 09-17-2013, 08:06 AM
Registered User
Join Date: Dec 2008
Location: oakville
Posts: 879
have you ever overheated? If its not a spark or fuel issue it can be a loose valve seat, when it happens usually on #2 cylinder
oldfamilyguy 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