Jeep will not start/run - JeepForum.com

 
LinkBack Thread Tools
post #1 of 3 Old 08-26-2011, 05:49 PM Thread Starter
Cross
Registered User
1991 YJ Wrangler 
 
Join Date: Jan 2007
Location: El Jebel, CO
Posts: 681
Jeep will not start/run

The Jeep was running fine then the other day I jump in it and it fires up then rpms drop steadily until it dies. Now when it does fire the rpms go up to about 1000 then it drops and shuts off. I have replaced the MAP and TPS sensor and nothing has changed. At one point I tried starting the Jeep without the MAP sensor plugged in the Jeep would start but idle very rough, if I hit the accelerator it would die. One time while just letting it idle rough all of a sudden it went up to about 2000rpm and dropped jump up again then dropped until it dies. for the most part I cannot even get it to start now. At times with the ignition turned it is firing and trying to start but as soon as you let go of the ignition it dies. I am at a loss to what is going on and how to fix it.


Sierra Club, helping to confine humans within city limits one acre at a time.
Cross is offline  
Sponsored Links
Advertisement
 
post #2 of 3 Old 08-26-2011, 05:55 PM
tobias94yj
Hillbilly Member
 
tobias94yj's Avatar
1994 YJ Wrangler 
 
Join Date: Oct 2002
Location: Sevierville, TN
Posts: 1,119
I know this generic but have you ruled out the simple stuff like the dist. cap and rotor and maybe even the coil and the coil plug? also are you getting a CEL? if so have you checked to see what code it is throwing?

To view the NEW Jeep Encyclopedia click here!!!
tobias94yj is offline  
post #3 of 3 Old 08-26-2011, 06:51 PM
oldtime_ironman
Web Wheeler
1991 YJ Wrangler 
 
Join Date: Dec 2010
Location: 14304 Niagara Falls
Posts: 2,537
Whats your fuel pressure look like? Should be about 31 PSI.

Only other things that come to mind would be the IAC valve and the cam position sensor - since the cam sensor tells it when to fire, it can mess with the timing. And you know how changing the timing can change the RPM's.
oldtime_ironman 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



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Jeep Wouldn't Start, Then Started, Now Won't Start - No Error Codes? drb TJ Wrangler Technical Forum 3 08-26-2011 12:50 AM
Jeep won't start - Starter doesn't start cooltc2004 YJ Wrangler Technical Forum 5 12-29-2008 10:36 AM
whats wrong with my jeep need answer asap (Jeep won't idle after jump start) Wrangler11 TJ Wrangler Technical Forum 24 11-04-2008 04:46 PM
Jeep wont start advice on where to start? vangosu TJ Wrangler Technical Forum 6 08-25-2008 08:28 AM
Wipers start when I start the jeep Rock & Roll TJ Wrangler Technical Forum 3 09-07-2005 10:12 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