Hesitating/Bucking issues (very specific) - JeepForum.com

 
LinkBack Thread Tools
post #1 of 8 Old 03-16-2017, 09:51 PM Thread Starter
064banger
Registered User
2006 TJ Wrangler 
 
Join Date: Feb 2009
Location: Dallas
Posts: 44
Hesitating/Bucking issues (very specific)

Hi
My TJ has started to hesitate/buck at specific times making it occasionally dangerous when turning in front of oncoming traffic. Do you guys have any ideas?

Starts: fine
Idles: fine
Revs: fine
Accelerating (<15% throttle): fine
Accelerating (>15% throttle): will hesitate in every gear whenever under 2500 rpm. Above that its fine. The further down I press the throttle the worse it gets until I get over 2500 rpm.

Thanks

064banger is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 03-17-2017, 04:58 AM
DockRocker
Registered User
 
Join Date: Sep 2015
Posts: 68
What have you done so far? Any codes?

Without more Intel I would suggest the usual. Clean the throttle body and air intake control AIC. Next step for me would be TPS as it seems to be throttle sensitive.


Sent from my iPhone using Tapatalk
DockRocker is offline  
post #3 of 8 Old 03-17-2017, 08:52 AM Thread Starter
064banger
Registered User
2006 TJ Wrangler 
 
Join Date: Feb 2009
Location: Dallas
Posts: 44
No codes unfortunately.

I've not made any attempt to fix it yet, I wanted to see if anyone had any ideas of where to look first. I've read it could anything from a bad TPS (as you said) or a failing fuel pump.
064banger is offline  
 
post #4 of 8 Old 03-17-2017, 09:40 AM
RicanLJ
Registered User
2004 LJ Wrangler 
 
Join Date: Jun 2009
Location: Fountain,Colorado
Posts: 169
Quote:
Originally Posted by 064banger View Post
a failing fuel pump.
Check the fuel pressure...........
RicanLJ is offline  
post #5 of 8 Old 03-17-2017, 10:41 AM
bparsel
Registered User
2011 JK Wrangler 
 
Join Date: Jun 2009
Location: Michigan
Posts: 186
When my '99 had a similar issue it was the O2 sensor.
bparsel is offline  
post #6 of 8 Old 03-18-2017, 06:09 PM
esad_b
Registered User
2005 LJ Wrangler 
 
Join Date: Apr 2006
Location: Fredericton
Posts: 2,671
Front O2 sensors on my 97 did something similar. Then a few years later, the crank shaft sensor, the thing would sometimes start fine but when I tried to drive it would feel like a riding a bull as it was bucking and jerking around.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
esad_b is offline  
post #7 of 8 Old 03-20-2017, 09:46 PM
baldness0351
Junior Member
1997 TJ Wrangler 
 
Join Date: Jul 2009
Location: Texas
Posts: 12
I have the same issue. I have cleaned the throttle body, replaced the TPS, AIC, and 02 sensor. It only does it occasionally. I'll check the fuel pressure and look into the crankshaft sensor.
baldness0351 is offline  
post #8 of 8 Old 03-21-2017, 09:50 PM
lizard20
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2007
Location: Chelsea
Posts: 203
My 2000 TJ 4.0 did the same thing. I replaced the crank shaft sensor, and no more issues.

2000 Jeep Wrangler Sahara, 4.0, Auto trans., Forest Green. 33x12.50x15, 2"BB, 1"BL.

Christian Jeep Club Member #65
lizard20 is offline  
Reply

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



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