94 Grand Cherokee High Idle Issues - 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 > General Technical Discussions > Engines & Drivetrain > 94 Grand Cherokee High Idle Issues

Engo LED Flush Mount Lights *PAIR* Flood or Spot 1,600 LumYukon Ultimate 35 axle kit for c/clip axles with Yukon ZipRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits

Reply
Unread 05-12-2012, 05:46 PM   #1
darco813
Registered User
 
Join Date: May 2012
Location: Boston, MA
Posts: 1
94 Grand Cherokee High Idle Issues

Hi everyone. I have a 1994 Jeep Grand Cherokee Laredo with the 5.2L V8. Recently, I've been having idle issues. I started it up one morning and the idle was around 1500rpm and steady in drive. I popped it into neutral and it idled at 2,100rpm. I've tested all the vacuum lines which tested out to be fine (19psi) and I've changed the TPS, cleaned the throttle body with an ultra sonic and it still idles at 1500 in neutral and around 1000 in drive. It makes it difficult to drive because you need to give it more brakes to stop it. Anyone have any clue as to what the problem could be?

darco813 is offline   Reply With Quote Quick reply to this message
Unread 05-20-2012, 10:35 PM   #2
obfdcherokee
Registered User
 
Join Date: May 2012
Posts: 40
Sounds like the plenum pan gasket is leaking. If you take the intake off and flip it over it has a bolt on plate with a gasket. This creates an internal vac leak. (aka sucking air though the engine)
obfdcherokee 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


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.