motorcraft 2150 help - coming off idle - JeepForum.com

 
LinkBack Thread Tools
post #1 of 6 Old 07-08-2008, 07:42 PM Thread Starter
Jermy01
Registered User
1978 CJ7 
 
Join Date: Sep 2004
Location: Santa Barbara, ca
Posts: 207
motorcraft 2150 help - coming off idle

hey guys. so i just got my rebuilt motor into my jeep. Motor runs good, but the carb definately needs a little help.

my biggest part is when i am coming off idle, especially if i just barely push the pedal, it cuts out. i rebuilt the carb when i was rebuilding the motor, but if i remember correctly it was doing that before i started the rebuild. the accelerator pump is working fine, and i tried adjusting the throw for the accelerator pump, still did the same thing. It does it whether its hot or cold. i did notice my carb is missing the dashpot on the throttle positioner, but i thought this was only for coming down to idle (which it does bog a little there too)

any help would be great. thanks


-Jeremy

1978 CJ7, front and rear locker, 31'' BFG mud Terrain, superior axles. RE 2.5" lift. 304 V8. Warn M8000.
Jermy01 is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 07-09-2008, 11:48 AM Thread Starter
Jermy01
Registered User
1978 CJ7 
 
Join Date: Sep 2004
Location: Santa Barbara, ca
Posts: 207
anyone???????

-Jeremy

1978 CJ7, front and rear locker, 31'' BFG mud Terrain, superior axles. RE 2.5" lift. 304 V8. Warn M8000.
Jermy01 is offline  
post #3 of 6 Old 07-09-2008, 11:54 AM
JeepHammer
Running On Empty...
1973 CJ5 
 
Join Date: Aug 2007
Location: South West Indiana
Posts: 11,180
It's your accelerator pump adjustment.

You just described a classic case of accelerator pump linkage problems.

You have to make sure the accelerator pump throws fuel the INSTANT the throttle shaft starts to move when you are adjusting!
JeepHammer is offline  
post #4 of 6 Old 07-09-2008, 03:14 PM
jeepdaddy2000
Registered User
 
jeepdaddy2000's Avatar
1971 CJ5 
 
Join Date: Jan 2002
Location: Eagle Point
Posts: 7,092
Might double check the umbrella seal in the pump housing. If it wasn't installed properly, it can cause a bog due to not sealing properly. Also, insure the diaphragm isn't in back wards.
jeepdaddy2000 is online now  
post #5 of 6 Old 07-09-2008, 04:42 PM Thread Starter
Jermy01
Registered User
1978 CJ7 
 
Join Date: Sep 2004
Location: Santa Barbara, ca
Posts: 207
i have played with the accelerator pump and it does squirt a shot as soon as i touch the throttle, will take it apart tho and make sure everything looks good in there

-Jeremy

1978 CJ7, front and rear locker, 31'' BFG mud Terrain, superior axles. RE 2.5" lift. 304 V8. Warn M8000.
Jermy01 is offline  
post #6 of 6 Old 07-09-2008, 09:39 PM
coas
Registered User
 
Join Date: Apr 2005
Posts: 442
Beside adjusting the acc pump you might need a new diaphragm.


Should look like the left one, if it's distort, like the one on the right, the amount of fuel in a shot is too low:
(30 years old OEM diaphragm vs after market junk)

84 CJ7 , Dana 44 rear D30 front, 258, 4.0 head, MPFI, e-fans, T176, Dana 300, 31x10.5x15 and Mustang hydroboost.
My esnips folders:Jeep Jeep Transmissions
coas is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Motorcraft 2150 carb ID? Mike1084 Jeep CJ Forum 6 06-25-2009 10:44 AM
Motorcraft 2150 carb b1gbee Jeep CJ Forum 1 03-26-2009 05:14 PM
Motorcraft 2150 specops72 Jeep CJ Forum 12 11-15-2008 09:57 PM
Motorcraft 2150 DFA Jeep CJ Forum 7 08-29-2008 10:06 AM
Motorcraft 2150 ? beaver24 Jeep CJ Forum 3 05-17-2005 07:14 AM

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 On
Refbacks are On

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