Starting issue... - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ 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 09-15-2011, 07:55 PM   #1
Newb
 
Join Date: Sep 2011
Location: Michigan
Posts: 2
Starting issue...

'91 YJ, 4.0L, manual trans. It's been sitting a while. I have hooked up a Snap-on "brick"(scan tool) and it will not communicate with the ECM. The Jeep won't start either. I've got voltage at various places around the engine bay(injectors, TPS, coil) only when I give pin 51 a ground myself. Pins 11 and 12 out of the ECM have good grounds. If I don't provide the ground she won't show me voltage anywhere. Does anyone have any hints before I breakdown and buy a new computer...maybe something else I can check? Any help would be greatly appreciated! Andy

Andy B is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

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.



Thread Tools

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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough running TJ - Electric or Fuel issue?? 666 TJ General Discussion Forum 4 07-01-2012 11:00 AM
1990 Starting issue davelyn1991 YJ Tech Forum 9 08-09-2011 09:19 PM
starting/idloling issue (Pictures and Video) Vermonter YJ Tech Forum 2 07-28-2011 04:42 PM
YJ starting issue aness2323 General Jeep Discussion 1 11-25-2009 03:26 PM
Rough Idle and Starting Issue crashnburn54 TJ Tech Forum 6 10-30-2009 09:11 AM



» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 10:52 AM.



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