NEDD Advice, Rough running , missing, backfiring? - JeepForum.com
 
LinkBack Thread Tools
post #1 of 4 Old 02-03-2009, 08:38 PM Thread Starter
jmacn31
Registered User
1994 ZJ 
 
Join Date: May 2008
Location: Monrovia, CA
Posts: 8
NEDD Advice, Rough running , missing, backfiring?

Ok fellow Jeep Heads, I have an 94 ZJ 4 door, 4.0L automatic, 2WD. The last 2 nights on my drive home from work, when I get stuck in traffic my ZJ starts to idle rough, act like it is starving or wants to stall, backfires(?- making a popping sound), and when I check the codes via the keyswitch method I get code 12, 41, and then 55 (the end code). Any ideas? Any help will be greatly appreciated.


~J-MAC~

"Setting an example is not the main means of influencing another, it is the ONLY means" ~Albert Einstein
jmacn31 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 02-04-2009, 02:33 AM
eshew
Registered User
1993 ZJ 
 
Join Date: Dec 2008
Location: Seattle
Posts: 488
For the codes: http://www.allpar.com/fix/80s-codes.html

Give us some info on teh Jeep, when was the last time you did a tune up? spark plugs and whatever, did you recently top off your tank before this happened? Bad gas, perhaps call the station where you filled up last just to make sure...WE NEED MORE INFO!
eshew is offline  
post #3 of 4 Old 02-04-2009, 09:32 PM Thread Starter
jmacn31
Registered User
1994 ZJ 
 
Join Date: May 2008
Location: Monrovia, CA
Posts: 8
OOPS!

Ok, tune up was done about 4K miles ago, I have about 1/2 a tank of gas from filling a week ago, have recently had the fuel pump replasced by a mechanic that took 3 tries to get right (after the 1st try the gas gauge would only read 3/4 full when topped off, after the 2nd try the gas gauge would only read 1/8 when topped off). My wife drove the Jeep today all day around town without incident. Last night in about 45 minutes of heavy (5-10 mph) traffic it would start to stutter and misfire whenever the trafic sped up enpough to require me to actually push on the accelerator pedal. Once I got over about 45 mph the problem seemed to go away. It never actually stalled but it was so rough that for awhile I thought I had jumped time... what other info do you need..btw, I really appreciate the assistance!

~J-MAC~

"Setting an example is not the main means of influencing another, it is the ONLY means" ~Albert Einstein
jmacn31 is offline  
post #4 of 4 Old 02-05-2009, 08:48 AM
JCZJ
Registered User
1998 ZJ 
 
Join Date: Jul 2007
Location: Missouri
Posts: 902
Quote:
Originally Posted by eshew View Post
WE NEDD MORE INFO!
Fixed it for ya

1998 ZJ // 5.2L // Lifted!
1994 ZJ // 4.0L // 271,000 miles // Some cool stuff // RIP 5/25/08
1965 Ford Mustang 2+2 // Boss 302 Swapped // Locked 9" rear

Quote:
Originally Posted by Shoey40 View Post
She can XJ my WJ whenever and however she wants. Hell, I'd let her CJ it, too.
JCZJ is offline  
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.



Email Address:
OR

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.




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



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
nedd help bleeding brakes jeepman1919 ZJ Grand Cherokee Forum 15 12-05-2009 02:05 AM
rough idle/missing=me stressed 02cbr ZJ Grand Cherokee Forum 2 12-01-2009 07:58 PM
Rich running/backfiring issues with my Grand Cherokee Country Boy ZJ Grand Cherokee Forum 31 04-27-2008 10:33 AM
jeep motor swap nedd help adrianpublic ZJ Grand Cherokee Forum 0 11-28-2006 02:43 PM
Running rich/missing Choff ZJ Grand Cherokee Forum 8 02-28-2004 09:32 PM

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