2.5 L High Idle - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 01-30-2003, 09:36 PM
Posts: n/a
2.5 L High Idle

My '93 Jeep has started to idle higher than normal this winter. The 2.5 L engine used to idle around 700 but now it is hanging out around 1100 RPM.

What should my Jeep be idling at? How can I fix this?

Sponsored Links
post #2 of (permalink) Old 01-30-2003, 10:24 PM
Way Outta Control
Join Date: Sep 1999
Location: The Palouse
Posts: 13,428
Thanks: 1
Thanked 2 Times in 2 Posts
Re: 2.5 L High Idle

1. Welcome to the forum.
2. Thanks for filling out your user profile.
3. Read the New Posters Message at the top of the forum.
4. Participate! Two brains are better'n one!
5. Do you have a manual?
6. Have you pulled the comptuer codes?
7. Have you cleaned the Throttle body?
9. Have you tested/cleaned the Automatic Idle Speed (AIS) Motor?
LEVE is offline  
post #3 of (permalink) Old 01-31-2003, 01:28 AM
Posts: n/a
Re: 2.5 L High Idle

My YJ idles @ 700 too, in winter, with the engine cold. But not always. Sometimes it just goes up @ 1000-1100 and stays there for a (short) while. Then it drops down to normal. I say, sometimes. Mostly when it's 0*F and lower.
Does it get back down, or is it like permanently @ 1100?
Sponsored Links
post #4 of (permalink) Old 02-01-2003, 07:17 PM
Posts: n/a
Re: 2.5 L High Idle

It pretty much stays there. It does, however, seem to dip down once I come to a COMPLETE stop. BUT, not always. For the most part it is hanging out at 1100 or better.

I am not sure how to do the other things the first poster suggested, should I get some carb-cleaner and blast it?

How do I grab the computer codes?

post #5 of (permalink) Old 02-03-2003, 03:19 AM
Posts: n/a
Re: 2.5 L High Idle

</font><blockquote><font class="small">In reply to:</font><hr />
How do I grab the computer codes?

[/ QUOTE ]

You do the on-off thing. With the engine shut off, you put the key into on (not cranking, just "on" where all the control lights on the dash light up), then back off, etc. You do it 5 times, like in: ON-OFF-ON-OFF-ON
Then you watch the "check engine" light blinking, and count those blinks. Those are the codes. It could give you something like 13-20-8-12 (I'm just throwing those numbers). Then, you ask around this board for somebody who has the codes meaning. Or search the net. I remember there was a post or two about this, so if you search the BBS, you'll find a post with a link.

Good luck!
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups 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.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome