2000 xj 4.0 runs like crap! - JeepForum.com

 
LinkBack Thread Tools
post #1 of 7 Old 08-26-2013, 06:33 PM Thread Starter
6inchyj33s350
Registered User
1991 YJ Wrangler 
 
Join Date: Apr 2009
Location: Ny
Posts: 19
2000 xj 4.0 runs like crap!

I bought a 2000 Jeep XJ 4.0 for $400
The PO said it sat, then wouldnt start, then they changed the Cam Sensor and now it starts and runs, but runs like crap!

-It has a consistent miss, from idle through all rpms, like its not running on all 6 cyl, whether cold or warm never different
-Has new Spark plugs, gapped correctly, the #5 plug was wet with fuel when I changed it
-I re-adjusted the cam sensor, even tried flipping it 180 and no change!
-I installed new crank sensor
-I can pull the #5 injector plug while idling and theres no change in idle.
-I swapped the #5 injector with #1 and no change when #5 is unplugged.
-I have not yet read codes, fuel pressure appears to be great, saw no cracks etc on coil rail while it was off, I have not tested compression yet, airbox is clean.

ANY IDEAS???

Thanks, Cory

6inchyj33s350 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 08-27-2013, 03:13 PM
uberxj92
Registered User
1992 XJ Cherokee 
 
Join Date: Oct 2012
Location: umatilla
Posts: 1,961
It may be a bad distributor cap. Broke on #5.

http://www.jeepforum.com/forum/f177/92-xj-sadness-2075657/index2.html
uberxj92 is offline  
post #3 of 7 Old 08-27-2013, 06:30 PM Thread Starter
6inchyj33s350
Registered User
1991 YJ Wrangler 
 
Join Date: Apr 2009
Location: Ny
Posts: 19
no distributor on my model, it has coil pack on plug. i wish it had a dizzy... Im going to try to a comp. test on all cylinders this weekend...
6inchyj33s350 is offline  
post #4 of 7 Old 08-27-2013, 07:29 PM
uberxj92
Registered User
1992 XJ Cherokee 
 
Join Date: Oct 2012
Location: umatilla
Posts: 1,961
Let us know results.

http://www.jeepforum.com/forum/f177/92-xj-sadness-2075657/index2.html
uberxj92 is offline  
post #5 of 7 Old 12-14-2013, 07:12 PM
shturner1975
Registered User
1995 ZJ 
 
Join Date: Jul 2013
Location: Selmer
Posts: 16
Any updates on this? I'm having similar issues with my 02 model. Wet plug, missing, etc.
shturner1975 is offline  
post #6 of 7 Old 12-16-2013, 02:35 PM
jimhensley
Registered User
2003 TJ Wrangler 
 
Join Date: Jan 2012
Location: clarksburg
Posts: 51
Bad MAP sensor?
jimhensley is offline  
post #7 of 7 Old 12-17-2013, 08:49 AM
Purcell69
Registered User
1993 ZJ 
 
Join Date: Apr 2010
Location: Oklahoma
Posts: 250
With a wet plug and constant miss on #5, I'd suspect the coil pack is bad. Put a test light on it and see if there is power to fire the plug at #5.

-Joe
Purcell69 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



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