High idle after thermostat change. - 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 Wrangler Forums > YJ Wrangler Technical Forum > High idle after thermostat change.

The NEW Revolution Gear and Axle from 4LowParts.comTHE NEW! VANCO DUAL MODE 15/16″ Big Brake Kit w/BlaEngo winches available at www.rockridge4wd.com! Free shipp

Reply
Unread 04-07-2013, 05:27 PM   #1
ChrisFish
Registered User
1990 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dallas, Texas
Posts: 1
High idle after thermostat change.

I recently did a thermostat change since the one that was in there was defective and causing the 2.5l to operate at about 160F. So after the change the Jeep got up to temperature and everything was fine and dandy, except when I got in it and was about to take off, the idle bumped up from 1000 RPMs to about 1400 RPMs. I fiddled with the throttle a little bit, but nothing changed. I took it around the block and the idle started to fall in and out between 1000 RPMs and 1400 RPMs. I am reluctant to alter the idle since I want to figure out why it is changing in the first place. Also will altering the idle change the way it will get up to temperature? Since now it operates at 195F which is significantly higher than what it was before. Just looking for clarification. Thanks.

ChrisFish is offline   Reply With Quote
Unread 04-08-2013, 09:24 AM   #2
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,547
195 is perfect, you will definitely notice an improvement in your fuel economy. You probably have a loose vacuum line. Use a can of carb cleaner and spray around to find it. Listen for an idle change as you spray around the throttlebody and all the vacuum mess under there.
Que89YJ is offline   Reply With Quote




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.