93 YJ won't start - 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 08-19-2014, 09:15 PM   #1
Newb
 
Join Date: Aug 2014
Posts: 1
93 YJ won't start

I began to have transmission issues roughly three months ago. I didn't have the funds to fix it till recently and had it covered under a tarp in the mean time. A few weeks ago I tried to start it just so it can run for a bit and the starter would go but the the jeep wouldn't run. After charging the battery for 30 min it struggled but was eventually able to get going again. Fast forward a few weeks later everything tranny/transfer case was rebuilt and back in place and when I would turn the key the lights and radio would turn on but the fuel pump didn't make its typical buzzing noise indicating it was engaged and the starter wouldn't even attempt to move. Tried charging the battery again and though it's showing 12v still nothing.
We found that we could manually engage the starter with a screwdriver, while it was still attached to the jeep, but the engine would not run. It turns out the started had a wire that had broke free during the removal of the tranny and after correcting this the starter would go, with the key, but still engine would not run.
After checking fuses/relays and replacing the ignition switch the problem persists. The jeep ran fine before the tranny issues and the fuel pump had been replaced (new) roughly a year and few months ago. Though it hasn't been dropped and checked I have a feeling it's not the pump as the starter would not engage as well but was getting power noted by manually doing so and the wire fix has solved that issue. We tried starter fluid in the intake to see if we could get some action from the engine but nothing. Using a nipple on the engine we discovered fuel was getting to it after replacing the switch cause pressing on it had fuel squirt out after turning the key from off to on a few times and now we can hear the pump engage on key turn.
We are running out of theory's of what the problem could be and I wanted input from others on what can be done before I take it to someone.

Christouski is offline   Quote Quick Reply
Old 08-19-2014, 10:14 PM   #2
Jeeper
 
Join Date: Jul 2012
Posts: 207
Start with the basics, sounds like you have focused on fuel to the rail but are the injectors actually firing? What about ignition? Could a ground strap be disconnected from the transmission work such that you are not getting power to the ECM?

WICruiser is offline   Quote Quick Reply
Old 08-20-2014, 10:27 AM   #3
Jeeper
 
AllMudd's Avatar
 
Join Date: Apr 2013
Location: SoCal
Posts: 1,462
Look at the trans bell housing at about the 11 oclock position. There is a CPS sensor there, if its damaged the least little bit this will cause the ignition/spark part of the cycle not to work. The crank position sensor...telks the computer hey im turning start sending spark. You may have damaged it while removing/installing the trans.
AllMudd 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




» Featured Product

All times are GMT -5. The time now is 08:22 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