'06 Grand Cherokee V8 rough idle and erratic RPMs - Page 3 - JeepForum.com
LinkBack Thread Tools
post #31 of 32 Old 11-27-2013, 07:14 AM
Registered User
2006 WK 
Join Date: Aug 2013
Location: Chicago
Posts: 254
Yeah, lately that's all I've been looking at (RPM's) It started bouncing at 500 and 300 right before it died this morning. The last 2 times it happen seemed to be shortly after starting up in the morning. The last time my wife took it to the store (about 3 mi away) and it died in the parking lot while she was waiting for a car to pull out of a spot. I'm certain there was no more than 1/2 tank of gas that time and this morning I have less the 1/4.

As for surges, yes, If I accelerate to like 40mph and then let off the gas, when it gets down to 1000rpms it'll surge to 1500 then quickly back down. There are other times when I'm 40-50mph and let off the gas and it doesn't slow down, it just hangs there for a while..

2006 4.7 Limited QD II, Stock
DVB is offline  
Sponsored Links
post #32 of 32 Old 06-15-2017, 01:00 AM
Registered User
2008 WK 
Join Date: Dec 2005
Location: Lansing, MI
Posts: 168
Originally Posted by caulk04 View Post
Do you hear any whistling (loud to moderate) that you can tell for sure isn't coming directly from the throttle body?

You could also spray a small shot of carb/brake cleaner at the hose connections or other suspect areas. If the idle goes up in relation, there would be a leak there.
I *DO* hear a (new) whistling noise. It's not terribly loud at city driving speeds, but ~40 and up -even at 80- I can hear it no prob in the cab.

Been getting slow cat response codes every couple hundred miles as well. Replaced a bank 2/2 O2 sensor that had been throwing a code non stop about a month ago, and that code has stopped. But now new issues.

NECROPOST, I know. Sorry. But at least I searched.

2008 WK Limited: 5.7L Hemi, QT2, stock.
RIP built '00 XJ
viator is offline  

loss of power , rough idle , rpms , stalling at stop

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


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