Click to view all our sponsors
Results 1 to 12 of 12

Thread: Carb Tuning Techniques

  1. #1
    Join Date
    Oct 2007
    Posts
    340
    Rep Power
    8

    Default Carb Tuning Techniques

    These sheets are from a Mitsubishi Minicab (Year and model I've forgotten now), but the carb setups and design are similiar to most Japanese models, although in slightly different positions. The diaphrams, linkages, and tuning techniques should be pretty close to many, and at least it is a starting point.

    Like I've said, carbs are the Achilles heel in these vehicles. The sheets will do little for a carb that needs an overhaul, or a complete swap.

    Don







    Last edited by greg0187; 12-14-2008 at 09:44 AM.

  2. #2
    Join Date
    Aug 2007
    Location
    The soggy, wet PNW...
    Posts
    132
    Rep Power
    8

    Default

    Hi Don,
    Thanks for the even more detailed carb (with translation wording) diagrams. The hardest part of doing any of these adjustments are some of the contorted positions required of hands, arms and body! Front right side engine bay vs. rear bed hatch access.
    Later!

  3. #3
    Join Date
    Jan 2008
    Location
    Las Vegas, NV
    Posts
    578
    Rep Power
    7

    Default

    Those pages look really familiar...I have the american manual for a slightly different carbureted mitsubishi. (89-95 mightymits truck 550cc) I put that chapter of the manual online at this link

    http://www.box.net/shared/0kpymfg7bs

  4. #4
    Join Date
    Oct 2007
    Posts
    340
    Rep Power
    8

    Default

    I appreciate all the thanks I continue to receive for these translations.

  5. #5
    Join Date
    Jun 2009
    Location
    Kemptshore, Nova Scotia
    Posts
    412
    Rep Power
    6

    Default

    Keep up the great work Don.... without your translations.. these pages would be useless clutter! Sure glad you are here to help us keep our little monsters alive!

    z
    1993 Suzuki Carry DD51T, 5 speed, up-graded rims to 13's from a geo metro
    Too much time on my hands and not enough fabrication gear to do all those "little" projects I NEED... ok want is more like it

  6. #6
    Join Date
    Mar 2008
    Posts
    177
    Rep Power
    7

    Default

    Has anyone ever had problems with the "variable venturi" system inside the carb? I'd like to figure out a way to test mine.
    1973 Mazda Rx3
    1989 Minicab 800cc 4x4
    Vancouver, BC

  7. #7
    Join Date
    Mar 2011
    Posts
    25
    Rep Power
    0

    Default carb for 3G81 engine problems

    Hi I recently bought a Mitsubishi U15D truck and it has carb problems. I have had it apart several times and it seems to be dumping to much fuel and won't idle at low RPM'S I don't know much about this style mikuni carb I have worked on a lot of motorcycle carbs but not like this. Does anyone know about working on or know were I can get a nother carb? Thanks, Steve

  8. #8
    Join Date
    Mar 2011
    Location
    SK Canada
    Posts
    11
    Rep Power
    0

    Default

    Thanks for this Don!
    Now I have another question for you or anyone on this forum;

    Where are the spark plugs, and what spark plugs do I buy at the store, and do I need a special tool to change them?

    How do I check them, how will I know they are in need of changing?

    Thanks,

    Candyk

  9. #9
    Join Date
    Nov 2010
    Location
    North Pole, Alaska
    Posts
    50
    Rep Power
    5

    Default sparkplugs

    depends on which truck and what year, my 88 U15T they are on the left side of the motor. Easily accessible from under the truck

  10. #10
    Join Date
    Mar 2011
    Location
    SK Canada
    Posts
    11
    Rep Power
    0

    Default Bravo Mini Van Spark Plug Location

    Oh lovely. I'm looking forward to getting under my van. Yoy. Mine is a 3g83, U42V. 3 cyl, DOHC. Does that help you or anyone else to know whether the plugs are easiest reached under the seat or under this van?

    I couldn't get it started in the end of winter, but changed the air filter and finally got it started with some persistence after that, let it run for a half hour, and haven't started it for about two weeks. Haven't really needed it, but want to make sure I'm not going to be stranded the next time I take it out.

    Any help from anyone would be greatly appreciated!

    --Candy

  11. #11
    Join Date
    Aug 2011
    Location
    mississippi
    Posts
    11
    Rep Power
    0

    Default

    Quote Originally Posted by sdjenk View Post
    Hi I recently bought a Mitsubishi U15D truck and it has carb problems. I have had it apart several times and it seems to be dumping to much fuel and won't idle at low RPM'S I don't know much about this style mikuni carb I have worked on a lot of motorcycle carbs but not like this. Does anyone know about working on or know were I can get a nother carb? Thanks, Steve
    hey if you still need help with the carb let me know i can rebuild it for you.

  12. #12
    Join Date
    Feb 2013
    Location
    Soldotna, Alaska
    Posts
    497
    Rep Power
    2

    Default

    Very cool. Tjamx for taking the time to.share this information. Even though you knew the repercussions of your kindness would result in thousands of questions.hahaha

Similar Threads

  1. Desperately need tuning help!
    By rstickley in forum Suzuki Carry
    Replies: 123
    Last Post: 11-18-2014, 02:15 PM
  2. 94 mitsu carb has a threaded hole in the top of the carb
    By oarlock in forum Mitsubishi Minicab
    Replies: 2
    Last Post: 10-17-2012, 04:51 AM
  3. Carb or carb kit 1972 ks4
    By DRMARGGY in forum Subaru Sambar References
    Replies: 0
    Last Post: 01-25-2011, 02:56 PM
  4. need help with a carb!
    By larryn2o in forum Daihatsu Hi jet
    Replies: 3
    Last Post: 10-17-2009, 01:00 PM
  5. Carb Tuning Techniques
    By Don-in-Japan in forum Mitsubishi Minicab References
    Replies: 0
    Last Post: 12-13-2008, 10:19 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •