Over-acceleration Liberty 2004, help needed! - 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 Liberty Forums > KJ Liberty Forum > Over-acceleration Liberty 2004, help needed!

Bead Lock Wheels! Raceline, Trail Ready, & Trail-GearUCF Black Friday SaleLOCKERS!!!! - ARB, Auburn, Detroit, Eaton, OX, Spartan, Yu

Reply
Unread 12-06-2011, 09:42 AM   #1
martha
Registered User
 
Join Date: Dec 2011
Location: port au Prince, Haiti
Posts: 1
Over-acceleration Liberty 2004, help needed!

Hi,

After being away for a week I was driving my Jeep Liberty 2004 (automatic transmission) yesterday, and it was like driving a wild horse! While the engine normally goes low with a nice grumbling sound, this time i would not go below 1500 rpm in neutral and park, and completely over accelerated by itself in Drive. It is mostly uphill but I didn't even have to press the gas pedal for most of it. Needless to say, my brakes were completely overheated at the end of the ride. Its a 30 min ride each way, and it didn't get better at all.

Can anyone tell me what may have happened? I live in Haiti, so the mechanics are not excellent so it would be good to have an idea of what's going on before I take it anywhere...

Thanks a lot!!!

martha is offline   Reply With Quote Quick reply to this message
Unread 12-06-2011, 09:44 AM   #2
dmblair
Registered User
2004 TJ Wrangler 
 
Join Date: Dec 2010
Location: Deer Creek, IL
Posts: 209
Are you getting any codes? First thing that comes to mind is throttle position sensor for some reason!
dmblair is offline   Reply With Quote Quick reply to this message
Unread 12-07-2011, 02:15 PM   #3
cmclean
Registered User
2003 KJ Liberty 
 
Join Date: Nov 2008
Location: Haiti
Posts: 45
Start with the simple things first, check that your floor mats/carpets are not holding the pedal down. After that I would check the cable and make sure that the throttle is closing properly.
cmclean is offline   Reply With Quote Quick reply to this message
Unread 12-07-2011, 09:18 PM   #4
LibertyTC
Registered User
2004 KJ Liberty 
 
Join Date: Sep 2008
Location: Vancouver B.C.
Posts: 907
Remove the throttle body air intake hose hose. Use throttle body cleaner and spray the throttle body & plate good and make sure that the linkage and plate are moving freely.
The throttle plate door should not be sticking and often a Q-tip with cleaner in it & around the inner edge top and bottom are required.
As you open and move the linkage the plate will move exposing edges. Once clean I use a bit of oil on edges.
The IAC (intake air control) controls the idle.
So with one T-20 torx bit screw on bottom of IAC remove it and do some spray cleaning in the port and also to the IAC.
It is probably so carboned up..it may be stuck good. You can also replace the IAC but cleaning normally does wonders.


Clean the Plunger & Areas

LibertyTC is offline   Reply With Quote Quick reply to this message
Unread 01-06-2012, 01:00 AM   #5
dlux
Registered User
2011 KK Liberty 
 
Join Date: Mar 2011
Location: Houston, Texas
Posts: 92
Wow, mine is disgusting. Thanks for the pics, huge help!!
What spray cleaner do you recommend? Dont wanna use the wrong one and jack it up. I've got enough problems already
__________________
2011 Liberty Limited 70th Anniversary Edition
dlux is offline   Reply With Quote Quick reply to this message
Reply

Tags
acceleration , gas , liberty , problems , transmission

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


Suggested Threads





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.