idle problem - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

Reply
 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 04-30-2008, 11:27 AM Thread Starter
 
Join Date: Aug 2007
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
 
idle problem

85 cj7 258 6cyl with stock carburetor dies everytime I let off the gas. Will not idle. Checked for vacuum leaks. What is most likely cause of this problem? I assume it is carburetor related. I am considering an upgrade to the Weber 34 DGEC carburetor. Any comments on this carb.
lefty915 is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 04-30-2008, 11:52 AM
Way Outta Control
 
Join Date: Sep 1999
Location: The Palouse
Posts: 13,432
Thanks: 1
Thanked 3 Times in 3 Posts
 
Click on the graphic... and commit the information to memory;
IMHO, dump the BBD and go with a DIY fuel injection system.
LEVE is offline  
post #3 of (permalink) Old 04-30-2008, 12:15 PM
Moderator
 
Jim_Lou's Avatar
 
Join Date: Dec 2001
Location: Belleville, Illinois
Posts: 11,485
Thanks: 15
Thanked 22 Times in 17 Posts
         
Since we don't know where Lefty lives, that may or may not be a good idea because of emission regulations. The BBD can be made to run properly. There have been several links to details of how to do it.

EVERYTHING's easy for the guy who doesn't have to do it.
B. Dash Fabrication
Jim_Lou is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 04-30-2008, 12:23 PM
Way Outta Control
 
Join Date: Sep 1999
Location: The Palouse
Posts: 13,432
Thanks: 1
Thanked 3 Times in 3 Posts
 
Quote:
Since we don't know where Lefty lives, that may or may not be a good idea because of emission regulations.
And... if lefty would fill out his profile... we'd be able to give better answers to questions.... I'm just say'n...
LEVE is offline  
post #5 of (permalink) Old 04-30-2008, 01:12 PM
Moderator
 
Jim_Lou's Avatar
 
Join Date: Dec 2001
Location: Belleville, Illinois
Posts: 11,485
Thanks: 15
Thanked 22 Times in 17 Posts
         
Yep. Where have I heard that before?

EVERYTHING's easy for the guy who doesn't have to do it.
B. Dash Fabrication
Jim_Lou is offline  
post #6 of (permalink) Old 04-30-2008, 01:19 PM
Keyboard Implanted
 
OlllllllOCJ's Avatar
 
Join Date: Jan 2004
Location: Indiana
Posts: 3,917
Thanks: 0
Thanked 0 Times in 0 Posts
 
Typical problem is clogged idle tubes, mentioned in the link Leve put up.

Or a different version if you click on "Easy Fix...." from the following page.

Carburetor Links

You will also find "Rebuild Instructions" and some other useful BBD things on that page.

A rebuild kit for the Carter is around $20, add a $5 fuel filter and a couple of hours... The instructions that come with the kit should be all that you need.

Unless you have a Weber, no investment, it's going to cost you both time and money.

Many folks have put a Motorcraft 2100 on Jeep 258's and love it. They are cheap if you can find one and more simple to rebuild than the Carter.

Fuel injection would be great but I'm fine with my stock BBD's on two old Jeeps.


Dale

Excellent Bad Example
OlllllllOCJ is offline  
post #7 of (permalink) Old 04-30-2008, 06:59 PM Thread Starter
 
Join Date: Aug 2007
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
 
no idle

Thanks, i'll try cleaning the idle tubes. I now have a profile. I am outside Austin, Tx and last year jeep passed emissions after some work. Coming up again in June. I think vehicles over 27 years old are exempt from some emissions testing. What about putting smaller jets on the 34 DEGC weber to reduce rich mixture. I don't know too much about engines and carbs except what I have taught myself by reading and trial and error.
lefty915 is offline  
post #8 of (permalink) Old 05-02-2008, 06:17 PM Thread Starter
 
Join Date: Aug 2007
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
 
idle fixed

It must have been the idle tubes. Poked it with a straight pin and sprayed carb cleaner. It runs the smoothest when the mixture screws are both turned counterclockwise about 6 turns out. Is this too far to turn out, since I read that you should start at about 2 and a half turns out.
lefty915 is offline  
post #9 of (permalink) Old 05-02-2008, 06:45 PM
Moderator
 
Jim_Lou's Avatar
 
Join Date: Dec 2001
Location: Belleville, Illinois
Posts: 11,485
Thanks: 15
Thanked 22 Times in 17 Posts
         
Do you mean it idles best with the screws 6 turns out?

That's not normal. There's probably something still blocked or restricted. If so, a rebuild is in order.

EVERYTHING's easy for the guy who doesn't have to do it.
B. Dash Fabrication
Jim_Lou is offline  
post #10 of (permalink) Old 05-02-2008, 06:56 PM
Keyboard Implanted
 
OlllllllOCJ's Avatar
 
Join Date: Jan 2004
Location: Indiana
Posts: 3,917
Thanks: 0
Thanked 0 Times in 0 Posts
 
Yes six turns from seated is a likely little much... But by now you could have just picked up a BBD rebuild kit and moved on to bigger and better things.

It is not very difficult. You don't want to rebuild the BBD - Then Don't.

Even if the carb is perfect... How's the ignition? Stock?

So many just toss out the Carter and start over when it isn't a big problem. But the thousand miles of vacuum line that comes with it just might be.


Dale

Excellent Bad Example
OlllllllOCJ is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups 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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome