temp gauge concern.. - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 04-15-2012, 08:14 PM   #1
Jeeper
 
wranglerbrother's Avatar
 
Join Date: Jul 2011
Posts: 589
temp gauge concern..

I have a 1990 2.5l 4cyl 5 speed yj.. and i havent noticed much wrong with the temp gauge until a few weeks ago.. it will randomly jump back and forth slowly between centerline and the line to the right of it.. indicating that it must be heating up? but im not out of coolant.. and its never actually jumped past the line that comes after centerline.. i notice it alot when im on the highway.. not real sure whats going on with it.. i dont want it to be overheating.. and i dont wanna ruin anything. after i got off the highway just recently.. its a 40 mph zone and it runs just about at centerline, until i put it nuetral? when i either hold the clutch in for a second or coast in nuetral to a redlight, it will jump almost to the next line.. does anyone know whats going on? thanks a lot!

__________________
New 2010 jk sport build: http://www.wranglerforum.com/f314/wr...jk-579913.html
Old 1990 yj Build Thread: http://www.wranglerforum.com/f8/my-black-yj-139424.html
Love them both.. miss my '90 :\
wranglerbrother is offline   Quote
Old 04-15-2012, 08:17 PM   #2
Jeeper
 
Xpress's Avatar
 
Join Date: Jan 2011
Location: El Cajon
Posts: 2,585
Check the contacts on the back of the gauge as well as the sensor itself.

__________________


2.5L Genius of some sort.
Xpress is offline   Quote
Old 04-15-2012, 08:23 PM   #3
Jeeper
 
Join Date: Nov 2011
Location: Richmond va
Posts: 99
IMHO, I think either the gauge is going bad (Not sure how many miles you have), or the Temp sensor is going bad. They are relatively cheap and if you are not into measuring resistance and voltages at various points, I would just replace the sensor and if it happens again, replace the gauge, and if it still happens replace the motor. Just kidding, could also be a bad thermostat which is another relatively cheap fix, as long as you can safely drain the radiator and protect the little critters that roam the neighborhood.
sfhusser is offline   Quote
Old 04-15-2012, 08:24 PM   #4
Jeeper
 
wranglerbrother's Avatar
 
Join Date: Jul 2011
Posts: 589
ok where is the sensor itself located? im a nooby at some of this stuff. :/
__________________
New 2010 jk sport build: http://www.wranglerforum.com/f314/wr...jk-579913.html
Old 1990 yj Build Thread: http://www.wranglerforum.com/f8/my-black-yj-139424.html
Love them both.. miss my '90 :\
wranglerbrother is offline   Quote
Old 04-15-2012, 08:37 PM   #5
Jeeper
 
Xpress's Avatar
 
Join Date: Jan 2011
Location: El Cajon
Posts: 2,585
Drivers side, back of the engine head block. Looks like a bolt sticking out with a green wire coming off of it.
__________________


2.5L Genius of some sort.
Xpress is offline   Quote
Old 04-15-2012, 08:42 PM   #6
Jeeper
 
wranglerbrother's Avatar
 
Join Date: Jul 2011
Posts: 589
alright thanks, im back at college but ill try to check it tomorow.. what should i look for to be wrong or different?

__________________
New 2010 jk sport build: http://www.wranglerforum.com/f314/wr...jk-579913.html
Old 1990 yj Build Thread: http://www.wranglerforum.com/f8/my-black-yj-139424.html
Love them both.. miss my '90 :\
wranglerbrother is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Refbacks are Off




Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 10:46 PM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

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