Go Back   Jeep Garage - Jeep Forum > Jeep Technical Discussion > Tech Tips DIY/How To

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 01-26-2014, 12:58 PM
Christian19's Avatar
Member
 
Join Date: Nov 2013
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 433
Christian19 is on a distinguished road
Garage
Rough idle

Hi I have a 02 grand cherokee with roughly 160xxx miles on it and it has an unsteady idle and feels rough. It's idle back and forth between 550 and 650 rpms. What could be causing this?
__________________

__________________
Reply With Quote
  #2  
Old 01-29-2014, 01:51 PM
sanjuro77's Avatar
Member
My Jeep: 1996 4.0L ZJ
 
Join Date: Dec 2013
Location: NE Ohio
Posts: 221
Thanks: 3
Thanked 18 Times in 16 Posts
Rep Power: 773
sanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond repute
Maybe a dirty IAC valve or throttle body? They're pretty easy to clean, tons of YouTube vids out there!
__________________

__________________
Reply With Quote
  #3  
Old 01-29-2014, 02:29 PM
Christian19's Avatar
Member
 
Join Date: Nov 2013
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 433
Christian19 is on a distinguished road
Garage
Quote:
Originally Posted by sanjuro77 View Post
Maybe a dirty IAC valve or throttle body? They're pretty easy to clean, tons of YouTube vids out there!
awesome thanks!
__________________
Reply With Quote
  #4  
Old 09-24-2014, 11:37 PM
Caseythered's Avatar
Member
 
Join Date: Sep 2014
Posts: 16
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 114
Caseythered is on a distinguished road
Re: Rough idle

Definitely helped on mine. '00 grand cherokee laredo. CRC throttle body cleaner is amazing!! Easy to do, major improvement! I also replaced the TPS sensor, which was causing some weird shift issues and the occasional sputtering.


Sent from my iPhone using JeepGarage
__________________
Reply With Quote
  #5  
Old 09-24-2014, 11:42 PM
Caseythered's Avatar
Member
 
Join Date: Sep 2014
Posts: 16
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 114
Caseythered is on a distinguished road
Re: Rough idle

http://youtu.be/7y6QYueOSss
After 186k miles, thing looked terrible, and i think someone tried to clean the IAC before, because there was a little piece of paper towel under the sleeve. Lol


Sent from my iPhone using JeepGarage
__________________
Reply With Quote
  #6  
Old 09-25-2014, 05:20 AM
sanjuro77's Avatar
Member
My Jeep: 1996 4.0L ZJ
 
Join Date: Dec 2013
Location: NE Ohio
Posts: 221
Thanks: 3
Thanked 18 Times in 16 Posts
Rep Power: 773
sanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond reputesanjuro77 has a reputation beyond repute
Quote:
Originally Posted by Caseythered View Post
http://youtu.be/7y6QYueOSss
After 186k miles, thing looked terrible, and i think someone tried to clean the IAC before, because there was a little piece of paper towel under the sleeve. Lol

Sent from my iPhone using JeepGarage
Yah man, first time I cleaned the iac on my ZJ the thing looked like it had been dipped in tar
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough idle clayts WJ Troubleshooting/Problems 0 09-23-2013 08:06 PM
v8 - rough idle Truck11 Trouble Shooting/Problems/Service 10 02-01-2013 11:39 AM
rough idle, really bad dunnie0420 Troubleshooting/Problems 2 11-14-2012 04:44 PM
Rough idle and jerking while driving. auron05 Troubleshooting/Problems 6 09-21-2012 05:58 AM
Rough idle on decline? TheAngryMinnow Grand Cherokee - WK 0 01-22-2011 10:26 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:59 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by Chrysler Group LLC.