rough idle for 5 or 10 minutes... - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 04-02-2008, 11:00 AM
Thread Starter
Jonny15's Avatar
Join Date: May 2007
Location: Dover, New Hampshire
Posts: 839
Jonny15 is on a distinguished road
rough idle for 5 or 10 minutes...

Hey everyone, ive got something for you all to figure out. I usually garage my jeep but the past week or so i've had it with me at college. Now i let it sit for about 5 days without running it in good weather (no rain). When i got in to start it up after these 5 days it ran fine.

So i left it again this time for about 2 days of steady rain. I get in to start it up yesterday and it idled really rough. When i put it in gear it was almost about to stall until i got it over 2000 rpm, then it ran perfectly smooth. But as soon as i let off the accelerator and dropped the rpms below 2000 again it wanted to stall out on me and ran extremely rough.

This whole problem only lasted for about 5 or 10 minutes, then this problem just vanished and it ran and idled smooth as ever. I've never had this problem before but my dad who has driven it a few times has had that happen twice to him. Again my jeep is usually garaged so it never sits out overnight in the rain. My dad only drives my jeep when its snowing out, so again its back to wet weather.

I'm thinking that this problem has something to do with moisture somewhere but i dont know where. Again this problem went away within 5 to 10 minutes and it ran perfect after that. I also started up this morning after leaving it in the garage (i came home for the night) and it started up and ran just fine. It just seems to have a problem idling and running below 2000 rpms for about 5 or 10 minutes after leaving it out in rain or snow overnight.

Any ideas??
Jonny15 is offline   Quote
Old 04-02-2008, 12:33 PM   #2
jeeperx2's Avatar
Join Date: Feb 2006
Location: Des Moines, Iowa
Posts: 353
jeeperx2 is on a distinguished road
what year is it? does it have distributor?

2004 TJ
4" suspension lift
sye/TW driveshaft
NTH degree c/a
2" body lift
aussie locker
Rancho rs9000 shocks
tube bumpers
33x12.50 firestone's
cold air intake
throttle body spacer
rear led's
sony MEX5DI deck
big ol amp
infinity speakers
jeeperx2 is offline   Quote
Old 04-02-2008, 01:26 PM   #3
Knows a couple things...

WF Supporting Member
Jerry Bransford's Avatar
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 42,404
Jerry Bransford is on a distinguished road
How is your battery? A very weak battery can make the engine run roughly since the alternator can't put out its full output when the battery is very weak.
When you have a choice, buy American.
Jerry Bransford is online now   Quote
Old 04-02-2008, 02:12 PM
Thread Starter
Jonny15's Avatar
Join Date: May 2007
Location: Dover, New Hampshire
Posts: 839
Jonny15 is on a distinguished road
The battery seems to be fine, it's never given me any problems. And yes it does have a distributor, which is the main culprit on my list of possibilities right now, as i know that if there is a crack in it somewhere and water gets in it'll run rough like that.
Jonny15 is offline   Quote
Old 04-02-2008, 02:26 PM   #5
Join Date: Sep 2006
Location: pahrump Nevada
Posts: 1,241
mr4x4 is on a distinguished road
every morning I have rough Idle when I start the jeep but only for about 30-60 seconds
I have changed the throttle pos. sensors but its still there I think its the Idle air control sensor
but thats on my jeep
mr4x4 is offline   Quote
Old 04-02-2008, 07:34 PM   #6
jpdocdave's Avatar
Join Date: Mar 2008
Location: beach park, il
Posts: 8,162
jpdocdave is on a distinguished road
how old are your wires? try sprayng ignition wires w/ spray bottle full of water. if it acts up after you spray wires, or you see arcing, tune up time. wouldn't be a bad idea if you haven't done it anyway.

"The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their president."
jpdocdave is offline   Quote

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Runing rough, idle rough, cylinder #4 misfire spdrcrpete TJ General Discussion Forum 13 06-02-2008 01:32 PM
Rough Idle BIG DAVE TJ Tech Forum 4 05-30-2008 09:14 PM
4.2 rough idle and stalling problem truemainer150 YJ Tech Forum 9 04-12-2008 05:10 PM
rough idle spanky TJ Tech Forum 9 04-08-2008 04:25 PM
I noticed rough idle after lift. bpowa TJ Tech Forum 11 07-31-2007 12:13 AM

All times are GMT -5. The time now is 10:54 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

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
« Back

Enter your email address:

Delivered by FeedBurner