Do all jeeps need time to warm up before driving - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ 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 06-26-2014, 08:30 PM   #1
Jeeper
 
Hp609's Avatar
 
Join Date: Jun 2014
Location: NJ
Posts: 376
Arrow Do all jeeps need time to warm up before driving

Hi, I bought a 98' wrangler last week. When I bought it the previous owner said because of the oil pan the car has it has to run for a little before driving. Everytime after I leave the car for a hour or more it will drive fine then randomly start to put put and it drives rough and you hear popping so you put it in nuetral(five speed) and coast for a little while it goes through an episode then it will run fine for the rest of the time and until you leave it for a while. It doesn't bother me that much but sometimes it happens right down the block and sometimes it happens when I get on the main road so it can be a bit dangerous. I'm wondering if this is a common thing and if it can be fixed. It's a four cylinder with 111k miles

Hp609 is offline   Quote
Old 06-26-2014, 08:44 PM   #2
Jeeper
 
Join Date: Oct 2011
Posts: 1,654
Quote:
Originally Posted by Hp609 View Post
...the previous owner said because of the oil pan the car has it has to run for a little before driving.
27 years of continuous Jeep ownership and I never knew that!!! (Which is not to say that I didn't know that Jeeps had oil pans.)

tangofox007 is offline   Quote
Old 06-26-2014, 08:55 PM   #3
Newb
 
Gracie104's Avatar
 
Join Date: Jun 2014
Posts: 10
Car?
Gracie104 is offline   Quote
Old 06-26-2014, 09:11 PM   #4
Jeeper
 
brettmess24's Avatar
 
Join Date: Apr 2014
Posts: 179
I would say that is not common, sounds like a fueling issue.....

Maybe fuel filter, pump or injectors....
brettmess24 is offline   Quote
Old 06-27-2014, 03:54 AM   #5
Jeeper
 
Airtight's Avatar
 
Join Date: Aug 2012
Location: Atlanta
Posts: 285
I know exactly what you are talking about, my 97 2.5 does the same thing. I am pretty sure it is due to my fuel pressure regulator/filter needing to be changed. Tell me, does it take longer to start after it has been sitting? My theory is that when the fuel drains back into the tank since the valve is not holding pressure, some air gets into the fuel line. When it starts, after about a minute or less of running fine, that 'air bubble' reaches the fuel rail and causes a slight stumbling for a few seconds. I usually can just 'rev through it' now that I expect it. I have the part, just gotta drop the tank and change it. One thing you can do to check if that's the problem is before you start your JEEP, turn the key to the on position without starting the engine, wait a few seconds, then repeat that twice, then start it. If it starts a lot quicker, that's probably your problem.
Airtight is offline   Quote
Old 06-27-2014, 06:10 AM   #6
Jeeper
 
DoubleOught's Avatar
 
Join Date: Feb 2014
Location: Nashville GA
Posts: 1,182
I would lean towards the fuel pump also.
DoubleOught is offline   Quote
Old 08-20-2014, 01:39 PM   #7
Jeeper
 
Hp609's Avatar
 
Join Date: Jun 2014
Location: NJ
Posts: 376
Forgot to post that I took it to a friends shop and they said it wasn't throwing any codes and the fuel pump was fine. The rest of summer went by and I started researching again last night And came across a thread with the same problem. I ended up unplugging the o2 sensor and the problem did no occur. Still no codes so I'll look into replacing it
Hp609 is offline   Quote
Old 08-20-2014, 01:52 PM   #8
Jeeper
 
freeskier's Avatar
 
Join Date: Mar 2011
Location: Longmont, CO
Posts: 2,743
Start the engine, give it a couple seconds for oil pressure to build and your good. I don't know what could possibly be special about our oil pans that would require a warm up period.
__________________
CU Boulder Aerospace Engineering
freeskier is offline   Quote
Old 08-20-2014, 06:57 PM   #9
Jeeper
 
Dragonjim's Avatar
 
Join Date: Jul 2014
Posts: 35
I only warm mine up when its cold.

Dragonjim 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 01:32 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