Quicker warm up question and driving a cold engine - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 03-18-2001, 07:51 PM Thread Starter
Enthusiast
 
Join Date: Jul 2000
Location: New York
Posts: 308
Thanks: 0
Thanked 0 Times in 0 Posts
 
Quicker warm up question and driving a cold engine

I have an '87 YJ with a 258 and a recently rebuilt Carter carb. I have done the TR upgrade and installed the MSD ignition. I was just curious if there are any upgrades to do that speed up the warming of the engine process. The jeep drives very nicely and idles well if I let it warm up at high idle for 7-10 minutes. If I start to drive before then, I pay for it the whole trip. It won't idle so well and sounds terrible, even after it warms up. Anything to do to have it warm up quicker? I have a Weber that I will be installing after tax season, I am an accountant. Will that speed things up at all. Thanks for all the advice in advance. Also, is it harming the engine or tranny in any way by driving it before it is fully warmed up?

Donny

1987 YJ 258 I6, 5 Speed, TFI Upgrade, MSD 6A, TFX Exhaust, Smitty Sure Steps, Weber to install when it gets a bit warmer
1999 Cherokee Sport, Stock
donnyg is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 03-18-2001, 07:56 PM
sas87yj
Guest
 
Posts: n/a
Re: Quicker warm up question

don't know donny-
my carter is fussy also. got a rebuilt one by holly. i'm not real happy with it but for now it will do. is your choke working ok? sounds like a choke prob possibly?
steve

post #3 of (permalink) Old 03-18-2001, 08:00 PM Thread Starter
Enthusiast
 
Join Date: Jul 2000
Location: New York
Posts: 308
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Quicker warm up question

Truth is I really don't know carbs so well, so I have no idea how or if it is supposed to be working. When I first start it, it goes into high idle. It does not come out of it on its own, I have to give it gas and release for it to come down to regular idle. Is that normal? Thanks. What kind of problem would the choke have and how can I tell if I do have problems?

Donny

1987 YJ 258 I6, 5 Speed, TFI Upgrade, MSD 6A, TFX Exhaust, Smitty Sure Steps, Weber to install when it gets a bit warmer
1999 Cherokee Sport, Stock
donnyg is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 03-18-2001, 08:03 PM
sas87yj
Guest
 
Posts: n/a
Re: Quicker warm up question

this site may help somehttp://www.off-road.com/jeep/tech/258bbd/Major.htm
i will continue later..gotta go
steve

post #5 of (permalink) Old 03-19-2001, 09:55 PM Thread Starter
Enthusiast
 
Join Date: Jul 2000
Location: New York
Posts: 308
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Quicker warm up question

.

1987 YJ 258 I6, 5 Speed, TFI Upgrade, MSD 6A, TFX Exhaust, Smitty Sure Steps, Weber to install when it gets a bit warmer
1999 Cherokee Sport, Stock
donnyg is offline  
post #6 of (permalink) Old 03-20-2001, 07:34 AM
Old Hand
 
Join Date: May 2000
Location: Raleigh, NC
Posts: 535
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Quicker warm up question

Basically... The linkage from the choke when it is closed causes the engine to fast idle (pulls the throttle back a little bit). As the engine warms up, the choke should open. If you take the air cleaner off, you will be able to see this happening. The choke controls the choke plate which is the one on top of the carb. Once it is warmed up, within a minute or so, the choke should be fully open and then you hit the gas and it comes back down to normal idle. It sounds like you might need to check your idle tubes:

Check this page:

http://www.off-road.com/jeep/tech/engine/carter.html


Mark
83 CJ-7 and 76 CJ-7 with stuff
sloop is offline  
post #7 of (permalink) Old 03-20-2001, 07:44 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Quicker warm up question and driving a cold engine

Donny , I recently rebuilt the Carter BBD on my 88 Wrangler with 258 . My input is that perhaps either the "pull-off choke " may need adjustment ( mine needed adjustment ) or else the traditional choke needs adjustment . I used drill bits to measure the clearance between choke plate and air horn . I crimped the linkage connecting to the choke pull-off 'til it met specs. Hope this helps. I am not an expert, just sharing my experience .

post #8 of (permalink) Old 03-20-2001, 08:01 PM
Enthusiast
 
Join Date: Sep 1999
Location: Des Moines, IA
Posts: 370
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Quicker warm up question and driving a cold engine

Here's a theory - your electric choke is not working. When it sits and warms up for 7-10 minutes, the underhood temperature gets warm enough to open the choke. When you drive it too soon, the underhood temperature never gets warm enough and the choke doesn't open. So check the choke and make sure it's open when your experiencing the problem.




jerry
87 Cherokee 4.0, 90 Wrangler 4.2, 95 Wrangler 2.5
jerry is offline  
post #9 of (permalink) Old 03-20-2001, 08:32 PM
 
Join Date: Sep 1999
Posts: 3,478
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Quicker warm up question and driving a cold engine

Does the air cleaner have the exhaust manifold "stovepipe" connection...... if it does, is it working properly? This enables the engine to draw air warmed by the exhaust manifold after start up thus warming the engine faster and ensuring that the fuel evaporates completely for normal combustion. After the engine warms, the air cleaner switches to draw cool air from outside the engine compartment.

xjy173 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