Results 1 to 7 of 7

Thread: poor MPG's lots of carbon at the tail pipe.

  1. #1

    Array
    Status
    Offline
    Join Date
    10-29-2014
    Posts
    1,220
    Location

    Earth, the Solar System
    Vehicle

    1985 Dodge Ram 50
    Engine

    G63B

    poor MPG's lots of carbon at the tail pipe.

    I have a streak of carbon on my driveway from it shooting out the back of this thing. It runs good and idles good but once I let it sit a week or more it is hard to start and a blast of carbon comes out. Tail pipe is black at the end and about 1/8 up the outside!
    It is definitely running very rich. I hardly get 200 miles on a full tank.
    Any ideas?

  2. #2

    Array
    Status
    Offline
    Join Date
    06-15-2014
    Posts
    6,059
    Location

    Adelaide, South Australia
    Vehicle

    1985 Mitsubishi L200
    Engine

    G63B
    Is it jetted right and have you tried adjusting the air fuel mixture screw? Getting the correct jet sizes will make a quantum leap of difference with overall performance but you should be getting way better mpg with the Weber carb.

  3. #3

    Array
    Status
    Offline
    Join Date
    10-29-2014
    Posts
    1,220
    Location

    Earth, the Solar System
    Vehicle

    1985 Dodge Ram 50
    Engine

    G63B
    I think "jetted right" is a range. I don't remember exactly but the Weber Carb Help thread you and pennyman helped me in the jets weren't exactly as recommended. It seemed like they were ok if I recall correctly. I suspect I may need to get a new carb or have it factory refurbished.

  4. #4




    Array
    Status
    Offline
    Join Date
    03-20-2011
    Posts
    4,851
    Location

    Pittsburgh, PA
    Vehicle

    1980 Dodge D-50
    Engine

    G54B
    when you changed the jets, did you check the float level setting? it sounds like either it is set too low, or it has a hole in it and it sinks when it sits for a while.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  5. #5

    Array
    Status
    Offline
    Join Date
    10-29-2014
    Posts
    1,220
    Location

    Earth, the Solar System
    Vehicle

    1985 Dodge Ram 50
    Engine

    G63B
    I didn't change the jets so much as put them in the right spots. The float is new and adjusted as instructed. I'm hoping the new air intake helps. I'll wait and see how the new intake affects it.
    Last edited by 85Ram50; 10-27-2016 at 06:53 PM.

  6. #6




    Array
    Status
    Offline
    Join Date
    03-20-2011
    Posts
    4,851
    Location

    Pittsburgh, PA
    Vehicle

    1980 Dodge D-50
    Engine

    G54B
    Are you running the mechanical fuel pump without a regulator, or an electric fuel pump? I don't remember if you said what you have.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  7. #7

    Array
    Status
    Offline
    Join Date
    10-29-2014
    Posts
    1,220
    Location

    Earth, the Solar System
    Vehicle

    1985 Dodge Ram 50
    Engine

    G63B
    Manual with regulator.

Bookmarks

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
  •