TJ Hard Start & rough idle(Everyone help plz) - JeepForum.com

 
LinkBack Thread Tools
post #1 of 8 Old 07-07-2010, 01:35 PM Thread Starter
Bwesley
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2008
Location: Akron
Posts: 25
TJ Hard Start & rough idle(Everyone help plz)

Hopefully Jerry or someone else wise will get wind of this one. Several months ago , my 98 TJ had small problems while starting and bigger problems when reaching speeds over 55mph. It would sputter and jerk really bad when reaching those speeds. I replaced the wires, plugs, ignition coil, rotor, and distributor cap. Still no change. I then took it in to get looked at. They replaced the front axle. After that, the sputtering at high speeds went away. However, I still experienced a hard start, then a rough idle. The first attempt to start fails. The second works, most of the time, followed by a temporary rough idle. I also feel that ever-so-slight sputter when I take my foot off the gas at high speeds.

About 3 months ago, I replaced the IAC Valve and cleaned out the throttle body. This did nothing. Over the last few months I added fuel injector cleaner to the tank twice, with no avail. I also attempted to clean the fuel injectors manually, but could not get them removed (must've done something wrong). Just today, I replaced the O2 sensor. Still, nothing. I am assuming the next step is to get to the fuel filter and maybe take another crack at the fuel injectors.

Bwesley is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 07-07-2010, 01:39 PM
freeskier93
Registered User
1997 TJ Wrangler 
 
Join Date: Oct 2009
Location: Highlands Ranch
Posts: 7,200
Pull your plugs and see what they look like, check you cat for clogging, and something fuel would be my last guess.
freeskier93 is online now  
post #3 of 8 Old 07-07-2010, 01:43 PM Thread Starter
Bwesley
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2008
Location: Akron
Posts: 25
Thanks. Never checked my CAT before. Is that very difficult??
Bwesley is offline  
post #4 of 8 Old 07-07-2010, 01:44 PM
vindicated
Did you miss me?
 
vindicated's Avatar
2006 TJ Wrangler 
 
Join Date: Nov 1984
Location: Rolling Ghettos
Posts: 1,434
x2 it would almost have to be fuel related. Mine is doing the same thing, and I have been told to replace the check valve on the fuel pump. This might explain the no start on the first try. Not sure if a 98 has that though.. Now, as far as sputtering while driving, may be your fuel pump, or maybe a clogged filter. Have you checked the fuel pressure yet?

Quote:
Originally Posted by bradthebard
Vin's so hard core, he drinks the whole jug of STFU and then has a three hour conversation about it.
vindicated is offline  
post #5 of 8 Old 07-07-2010, 01:50 PM Thread Starter
Bwesley
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2008
Location: Akron
Posts: 25
I have not checked the fuel pressure yet. Quick way to do so??????
Bwesley is offline  
post #6 of 8 Old 07-07-2010, 02:48 PM
Sundowner
Registered User
2003 TJ Wrangler 
 
Join Date: May 2009
Location: The Republic of Dave
Posts: 6,408
Should be a connection for a gauge on the rail...

Do you have any check engine light activity? Any codes?

Also, did you say they replaced the front axle??? Why??? Tell me, tell me, I implore...!

If it's worth doing, then it's worth overdoing.

The Republic of Dave: Bringing you the finest in simian testing supplies.

The build, the gear, and the mileage: The Wasteland Survival Guide
Sundowner is offline  
post #7 of 8 Old 07-07-2010, 02:49 PM
vindicated
Did you miss me?
 
vindicated's Avatar
2006 TJ Wrangler 
 
Join Date: Nov 1984
Location: Rolling Ghettos
Posts: 1,434
Also, a nice, filled in profile would be nice.

Quote:
Originally Posted by bradthebard
Vin's so hard core, he drinks the whole jug of STFU and then has a three hour conversation about it.
vindicated is offline  
post #8 of 8 Old 07-07-2010, 06:53 PM Thread Starter
Bwesley
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2008
Location: Akron
Posts: 25
So tomorrow morning, I wil pull the plugs and see what they look like. I did have a check engine code several months ago (p0505?) 5th cylinder. The mechanic said that my front axle was in very bad shape and could have been the cause of me losing power while approaching high speeds, and while driving up an incline. Keep coming with the input!! And I will update my profile .
Bwesley is offline  
Reply

Tags
hard , start , rough , idle , TJ

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
2.5 hard start cold, rough idle, sometimes stalls 91wrangler4cyl YJ Wrangler Technical Forum 1 01-01-2010 08:29 AM
1997 2.5 will not start on incline and rough start/idle when cold. BuckeyeTJ TJ Wrangler Technical Forum 0 11-24-2009 09:39 AM
4.0 Hard Start / Backfire / Rough Run after extended idle biasdesign YJ Wrangler Technical Forum 8 09-17-2009 06:18 AM
Rough idle and hard start '89 2.5L Matt_vs_YJ YJ Wrangler Technical Forum 19 04-18-2008 06:38 PM
2.5L Hard start and rough idle... Elf YJ Wrangler Technical Forum 15 02-27-2008 08:39 PM

Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

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