Engine misfire? - JeepForum.com
Search  
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 > Engine misfire?

Artec 14b bolt BACKBONE trussNEW!! HMF 50"-52" light bar mounting brackets!! Engo is bringing New LED Light Bars to the table...Get a g

Reply
Unread 03-22-2007, 06:32 PM   #1
Hydro
Registered User
2000 TJ Wrangler 
 
Join Date: Jun 2006
Location: East Springfield, Pa
Posts: 435
Engine misfire?

I have a problem with my jeep,the check engine light came on,so we pulled some codes and it say cylinder #6 misfire,so i tried new plugs and it's still running rough,i'm kinda stumped on this one,i don't know if it could be a dirty injector or what.still pondering any tips? Thanks.

Hydro is offline   Reply With Quote Quick reply to this message
Unread 03-22-2007, 08:03 PM   #2
Hydro
Registered User
2000 TJ Wrangler 
 
Join Date: Jun 2006
Location: East Springfield, Pa
Posts: 435
I forgot to add,it's a 2000 sport with the 4.0,thanks.
Hydro is offline   Reply With Quote Quick reply to this message
Unread 03-22-2007, 08:17 PM   #3
Ronron2112
Registered User
 
Join Date: Nov 2006
Location: Westford, MA
Posts: 135
Try swapping your injectors with a different cylinder, if the cylinder with the old #6 injector is missfiring, then you have either a bad injector or a dirty one. If it's still #6, then it could be a spark issue (check your coil pack) or faulty wiring on the injector (use a noid light to check this) Good luck!

(i have a 2000 XJ Sport with a dreaded #3 missfire...)

-Ron
Ronron2112 is offline   Reply With Quote Quick reply to this message
Unread 03-22-2007, 08:23 PM   #4
TXjeepTJ
Registered User
 
Join Date: Nov 2003
Location: Magnolia and Lubbock TX
Posts: 1,024
sea foam, it fixes anything! (give it a try)
__________________
LS1 powered TJ
http://www.jeepforum.com/forum/f7/my-v8-swap-blog-updates-365293/
C6 Z06 Corvette
TXjeepTJ is offline   Reply With Quote Quick reply to this message
Unread 03-23-2007, 03:37 PM   #5
Hydro
Registered User
2000 TJ Wrangler 
 
Join Date: Jun 2006
Location: East Springfield, Pa
Posts: 435
I tried the seafoam, didnt work. I'm getting ready to change out the injectors here in a few mins. If that doesnt work I dunno what to do next.

-Mike
Hydro is offline   Reply With Quote Quick reply to this message
Unread 03-23-2007, 09:50 PM   #6
Ronron2112
Registered User
 
Join Date: Nov 2006
Location: Westford, MA
Posts: 135
If the injector swap is still miss firing on #6, Se sure to use a noid light to check for power to the injector itself. If it has power, then it's gotta be some sort of spark issue. Since you've replaced the plugs, the leading factor has gotta be that $130 coil rail. double check all the connectors too, anything you could do for free beats replacing that coil rail.

But in my young life I've seen a CKP/CMP sensor on the fritz give a random missfire here and there. Good luck!

-Ron
Ronron2112 is offline   Reply With Quote Quick reply to this message
Unread 03-24-2007, 10:02 AM   #7
Hydro
Registered User
2000 TJ Wrangler 
 
Join Date: Jun 2006
Location: East Springfield, Pa
Posts: 435
Thaks for the help guys. I changed out the entire fuel injector rail from another 4.0 I have at the house and it fixed everything.

-Mike
Hydro is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

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.