Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum > idles high and overheated

Join Wrangler Forum Today

Thread: idles high and overheated Reply to Thread
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the Jeep Wrangler Forum 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 email 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.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
07-26-2013 09:14 PM
Originally Posted by western196611 View Post
They do have them now (thermostats) when they go bad they will stick open....
Checked with my mechanic buddy just today, no such thermostat exists that is guaranteed to stick open... They say they do, but the manufacturers will not warrant them..
07-26-2013 12:43 PM
western196611 They do have them now (thermostats) when they go bad they will stick open....
07-26-2013 11:24 AM
pi55edoff That would've been my first guess as well since the heater being on didn't help it.
07-19-2013 09:45 PM
Jkubat Discovered the thermostat went bad. I put it in boiling water, no movement at all. Left it out, ran the jeep for a bit, no problems. Will replace tomorrow.
07-19-2013 05:47 PM
idles high and overheated

'06 X, 4.0L Inline 6, auto trans

Here's the problem:

Recently replaced cooling system - radiator, water pump, thermostat, cap.
I have noticed the last few days it was still running a bit higher than the 210 reading but I haven't seen any fluid drops or leaks anywhere.

Today it went into the red, turned on heat to draw away from motor, not much effect. Not wanting to be stranded with my wife and daughters I continued driving home.

As we were driving I noticed if I released the gas pedal the jeep kept traveling at the same speed, when braking it wanted to keep driving. When I put it in neutral the rpm gauge was near 2800.

As I continued to drive it started making a knocking noise, the power was down, unless I dropped into 2nd there was no acceleration, or at most very little.

When I pulled in the driveway she quit.

After the smoke/steam cleared I noticed two threaded rods at what I presume to be the intake manifold. There was no nut on either. It looks to be a heat shield covering the part.

I did notice smoke/steam coming out from around the manifold.

Any ideas?

I tried cycling the key to read the code on the odometer but all I got was "done"

Help would be greatly appreciated to try diagnosing this issue.

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

All times are GMT -5. The time now is 04:50 AM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC