ZJ idling rough - 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 > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > ZJ idling rough

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineSteering and more from Ruffstuff!Even Better Heim Pricing! From Ruffstuff

Reply
Unread 06-03-2013, 06:46 PM   #1
TKFlight
Registered User
1995 ZJ 
 
Join Date: Jun 2013
Location: , PA
Posts: 42
ZJ idling rough

As the title states my jeep is idling rough when at a red light, etc, I'm assuming its nothing serious since my jeep drives fine. I was thinking maybe it was the throttle body needing to be cleaned. Any other info would be appreciated.

TKFlight is offline   Reply With Quote Quick reply to this message
Unread 06-03-2013, 07:32 PM   #2
picflight
Registered User
1996 ZJ 
 
Join Date: Jun 2010
Location: Los Angeles
Posts: 59
It could also be a fuel delivery system that's faulty.
picflight is offline   Reply With Quote Quick reply to this message
Unread 06-03-2013, 10:01 PM   #3
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Clean the throttle body and the IAC. It's a little spindle on the back of the throttle body held in by two torx bolts. Take it out and clean it, but don't push it in/out while you are cleaning it.

Report back.
JasonStebbins is offline   Reply With Quote Quick reply to this message
Unread 06-03-2013, 10:07 PM   #4
TKFlight
Registered User
1995 ZJ 
 
Join Date: Jun 2013
Location: , PA
Posts: 42
Just need to go out and get throttle body cleaner now, and I'll check the IAC while I'm at it. Will report back when its done
__________________
1995 Jeep Grand Cherokee Laredo 4.0L
251K+ miles
TKFlight is offline   Reply With Quote Quick reply to this message
Unread 06-03-2013, 10:10 PM   #5
WhiteOut
Web Wheeler
 
WhiteOut's Avatar
1998 ZJ 
 
Join Date: Dec 2007
Posts: 8,175
Quote:
Originally Posted by JasonStebbins View Post
Clean the throttle body and the IAC. It's a little spindle on the back of the throttle body held in by two torx bolts. Take it out and clean it, but don't push it in/out while you are cleaning it.

Report back.
This. It's a T25 torx
WhiteOut is offline   Reply With Quote Quick reply to this message
Unread 06-03-2013, 10:50 PM   #6
Oldfrog
Web Wheeler
1997 ZJ 
 
Join Date: Feb 2008
Location: Louisiana/Texas
Posts: 4,113
After cleaning the throttle body and IAC, go ahead and pop the distr. cap open too. Clean and inspect it. Lift the plate inside ( cam sensor) and clean under it. Then pour a 1/3 can of Seafoam in your gas tank.
__________________
Cajun Recipes and Fishing tips

Words of wisdom, Posted by Zeejay:
"..it's not air, it is the opposite of air... suckage so to speak."

Stalling? Work through Zeejay's list
Oldfrog is offline   Reply With Quote Quick reply to this message
Unread 06-04-2013, 11:06 AM   #7
L_Kilkenny
Registered User
1989 YJ Wrangler 
 
Join Date: May 2013
Location: Story City, Iowa
Posts: 114
Check your vacuum lines..............

I do it by spraying carb cleaner around every hose and fitting. You'll hear the change pretty quick when you hit the leak.
L_Kilkenny is offline   Reply With Quote Quick reply to this message
Unread 06-04-2013, 05:56 PM   #8
TKFlight
Registered User
1995 ZJ 
 
Join Date: Jun 2013
Location: , PA
Posts: 42
Thanks for the replies guys. I was doing some research on here and found out that there are no MAF sensors on Jeeps(laugh at me if you want)

http://www.jeepforum.com/forum/f310/maf-sensor-1084165/

I got a picture of my throttle body, and is the IAC the part to side with a power connector going to it?

http://i.imgur.com/e2AsiYK.jpg
TKFlight is offline   Reply With Quote Quick reply to this message
Unread 06-04-2013, 07:36 PM   #9
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
The IAC is North in your picture. The sensor North East is the TPS. (Throttle Position Sensor)

JasonStebbins is offline   Reply With Quote Quick reply to this message
Unread 06-04-2013, 11:05 PM   #10
dnuccio
Registered User
1995 ZJ 
 
Join Date: Jul 2012
Location: Phoenix, AZ
Posts: 3,484
my 5.2 was idling rough so i took the throttle body off, took off all the sensors, and cleaned it really well. also cleaned the IAC. runs much better and smoother
__________________
Reliability is relative
R.I.P. Ratmonkey
dnuccio 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






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.