YJ Starting problems... - 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 07-30-2011, 05:25 PM   #1
Jeeper
 
Inked's Avatar
 
Join Date: Oct 2006
Posts: 100
YJ Starting problems...

Hello,

My Jeep used to have a hard start if I let it sit for over 24 hours, however recently it's been having this issue intermittently - hot or cold. I looked at my throttle body and that valve on the top seems to stay open even when engine is cold...I believe I read somewhere in this forum that this supposed to be closed? I manually closed the valve and the Jeep started right up.

How do I adjust this to the close position? I see no where on this stinkin' thing to adjust this. And if I do adjust this will this solve my intermittent starting problems on both hot or cold?

I don't know too much about these things so any help with video and pics are appreciated!!

Thanks!
Attached Thumbnails
Click image for larger version

Name:	carb1.JPG
Views:	46
Size:	66.0 KB
ID:	60182   Click image for larger version

Name:	carb2.JPG
Views:	47
Size:	60.8 KB
ID:	60183  


Inked is offline   Quote Quick Reply
Old 07-30-2011, 05:42 PM   #2
Jeeper
 
ryanno3's Avatar
 
Join Date: Feb 2011
Location: Decatur, GA
Posts: 32
I'll just press the gas three or four times and it shuts. Good luck.

ryanno3 is offline   Quote Quick Reply
Old 07-30-2011, 05:42 PM   #3
kik
Jeeper
 
kik's Avatar
 
Join Date: Dec 2008
Posts: 4,833
Images: 1
The housing to the left of the carb as you're looking at it from the front is the auto choke adjustment spring. It has a black cap with "hash" marks on it, from rich to lean. Loosen the screws, but don't remove them. Turn the black part of the housing to center and then go 1 notch rich. As you move the housing back and forth you should see your carb. flap moving when cold. If it doesn't you might have a broken spring. This would cause the choke not to set. Move it to one notch rich when cold and then try to start it. If it doesn't and you now think the spring has failed remove the black plastic housing to determine if there is a broken spring. If not, the mechanism internal to the carb. might have failed.
kik is offline   Quote Quick Reply
Old 07-30-2011, 05:45 PM   #4
Jeeper
 
Inked's Avatar
 
Join Date: Oct 2006
Posts: 100
Quote:
Originally Posted by kik View Post
The housing to the left of the carb as you're looking at it from the front is the auto choke adjustment spring. It has a black cap with "hash" marks on it, from rich to lean. Loosen the screws, but don't remove them. Turn the black part of the housing to center and then go 1 notch rich. As you move the housing back and forth you should see your carb. flap moving when cold. If it doesn't you might have a broken spring. This would cause the choke not to set. Move it to one notch rich when cold and then try to start it. If it doesn't and you now think the spring has failed remove the black plastic housing to determine if there is a broken spring. If not, the mechanism internal to the carb. might have failed.
Yes I have seen this but wasn't sure how to adjust it..I will give it a shot. Thank you!!
Inked is offline   Quote Quick Reply
Old 07-30-2011, 05:46 PM   #5
Jeeper
 
Inked's Avatar
 
Join Date: Oct 2006
Posts: 100
Quote:
Originally Posted by ryanno3 View Post
I'll just press the gas three or four times and it shuts. Good luck.
will try this as well! thanks!
Inked is offline   Quote Quick Reply
Old 07-30-2011, 08:01 PM   #6
Jeeper
 
Inked's Avatar
 
Join Date: Oct 2006
Posts: 100
Okay i adjusted the valve plate to "closed" when engine is cold...tried to start it up and it seemed as if the engine was grasping for fuel. I played around with different settings, even going according to my Chilten's manual which was 2.4mm between the plate and the air horn wall however it still seemed like it wasn't getting fuel or air? (not sure)

I had no choice but to place it back to the original setting which was open to about 7mm in order for my jeep to start. Does this sound right? And wouldn't having the valve plate always open be the cause for my intermittent starting problems?

Also the picture attached was taken when the engine was pretty warm and as you can see the valve plate is open...am I missing something, is there some kind of electronic system controlling the valve plate as well??

Thanks in advanced WF!
Inked is offline   Quote Quick Reply
Old 07-30-2011, 08:25 PM   #7
Jeeper
 
Inked's Avatar
 
Join Date: Oct 2006
Posts: 100
found some good insight into how these things work..What is the choke and what does it do? — Yahoo! Autos
Inked is offline   Quote Quick Reply
Old 07-31-2011, 10:16 AM   #8
kik
Jeeper
 
kik's Avatar
 
Join Date: Dec 2008
Posts: 4,833
Images: 1
Quote:
Originally Posted by Inked View Post
Okay i adjusted the valve plate to "closed" when engine is cold...tried to start it up and it seemed as if the engine was grasping for fuel. I played around with different settings, even going according to my Chilten's manual which was 2.4mm between the plate and the air horn wall however it still seemed like it wasn't getting fuel or air? (not sure)

I had no choice but to place it back to the original setting which was open to about 7mm in order for my jeep to start. Does this sound right? And wouldn't having the valve plate always open be the cause for my intermittent starting problems?

Also the picture attached was taken when the engine was pretty warm and as you can see the valve plate is open...am I missing something, is there some kind of electronic system controlling the valve plate as well??

Thanks in advanced WF!
On these carbs if that plate is completely closed it will also cause a hard start. At this point they're probably are other issues with the carb. The plate is controlled by the auto choke housing. Unfortunately, you're probably due for a rebuild or replacement. If there is'nt a problem with the fuel pump or filter, then it would be a carb. issue. The float could be sticking also, so it seems to all go back to a tired carb.
kik is offline   Quote Quick Reply
Old 07-31-2011, 08:02 PM   #9
Jeeper
 
Inked's Avatar
 
Join Date: Oct 2006
Posts: 100
Quote:
Originally Posted by kik View Post
On these carbs if that plate is completely closed it will also cause a hard start. At this point they're probably are other issues with the carb. The plate is controlled by the auto choke housing. Unfortunately, you're probably due for a rebuild or replacement. If there is'nt a problem with the fuel pump or filter, then it would be a carb. issue. The float could be sticking also, so it seems to all go back to a tired carb.
thanks kik will definitely look into a rebuild. by the way do you know what kind of carb this is? Is this stock?

Inked 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:
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
2006 Jeep starting problems laydyrider TJ General Discussion Forum 21 03-03-2014 07:58 PM
2006 Jeep TJ problems starting slyfox250 TJ General Discussion Forum 3 07-20-2011 07:19 AM
Starting, Stalling problems in Rain. Poochie TJ General Discussion Forum 12 02-28-2011 08:50 PM
Starting problems... Any help? wesman1 YJ Tech Forum 0 02-23-2011 10:27 AM
93 4.0L starting problems...HELP!! hondadbing116 YJ Tech Forum 6 02-07-2009 06:24 PM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 02:07 PM.



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