1965 stock 383 don't like trafic jam

Engine, Transmission & Driveline

  1. mathiew

    mathiew Member

    Messages:
    52
    Likes Received:
    3
    Joined:
    Oct 19, 2017
    Location:
    Canada
    I have 1965 300 2 barrels, everything is stock, it run well at normal speed, but when traffic jam it start to run bad, stumble and exhaust pop, and after 5 min to run in normal speed it run good!
     
  2. mr. fix it

    mr. fix it Old Man with a Hat

    Messages:
    6,274
    Likes Received:
    3700
    Joined:
    Aug 14, 2013
    Location:
    Welland, ON
    based on your description, it sounds like the carb is loading up and leaking into the intake...
    I would check the float level of the carb as it seems like it is a bit higher than spec. level
    Maybe time for a rebuild if it hasn't been done in a while
     
    • Agree Agree x 1
  3. mathiew

    mathiew Member

    Messages:
    52
    Likes Received:
    3
    Joined:
    Oct 19, 2017
    Location:
    Canada
    It was rebuild last summer
     
  4. Newport 66

    Newport 66 Senior Member FCBO Gold Member

    Messages:
    3,195
    Likes Received:
    2073
    Joined:
    Aug 6, 2017
    Location:
    Lancaster, WI
    I would summize that the carb is loading up with fuel causing a rich condition. Check the mixture screws first and if necessary the float level.
     
  5. Davea Lux

    Davea Lux Senior Member FCBO Gold Member

    Messages:
    4,100
    Likes Received:
    1025
    Joined:
    Mar 27, 2017
    Location:
    Cornelius Or
    You might also be boiling the carb as the engine will run hotter in traffic due to less air flow thru the radiator. Check your heat riser to be sure it is not stuck as that will also boil the carb.

    Dave
     
    • Agree Agree x 2
  6. mr. fix it

    mr. fix it Old Man with a Hat

    Messages:
    6,274
    Likes Received:
    3700
    Joined:
    Aug 14, 2013
    Location:
    Welland, ON
    good point Dave. I had forgotten about that part...
     
  7. mathiew

    mathiew Member

    Messages:
    52
    Likes Received:
    3
    Joined:
    Oct 19, 2017
    Location:
    Canada
    It’s open or closed?

    4099F42D-ABBF-4EA0-B610-C8186DC99130.jpeg
     
  8. Imperialist67

    Imperialist67 Well-Known Member FCBO Gold Member

    Messages:
    674
    Likes Received:
    198
    Joined:
    Jul 16, 2013
    Location:
    Washington, DC
    THANKS - I'm having the same problem with the Diplomat, we've tried everything else, maybe THIS is the culprit.
     
  9. Davea Lux

    Davea Lux Senior Member FCBO Gold Member

    Messages:
    4,100
    Likes Received:
    1025
    Joined:
    Mar 27, 2017
    Location:
    Cornelius Or
    First check to see if it moves freely. The weight should be down when the valve is open.

    Dave
     
  10. mathiew

    mathiew Member

    Messages:
    52
    Likes Received:
    3
    Joined:
    Oct 19, 2017
    Location:
    Canada
    Its free but broken spring! Seam to be alway down! Wich way my carb will not be heated? Down or up?
     
    Last edited: Jul 3, 2019
  11. HWYCRZR

    HWYCRZR Senior Member FCBO Gold Member

    Messages:
    1,494
    Likes Received:
    2062
    Joined:
    May 13, 2015
    Location:
    Fargo, ND
    ‘68- 383 & 440 counter clockwise is open. 318 is clockwise.
    If you blip the throttle when it is warm you should see it rotate ccw if it is free. Even if it is working, at idle it will be partially closed as it uses the exhaust gas flow to open it.
     
  12. mathiew

    mathiew Member

    Messages:
    52
    Likes Received:
    3
    Joined:
    Oct 19, 2017
    Location:
    Canada
    Simple question: it’s not heated when counterweight is UP or DOWN?
     
  13. HWYCRZR

    HWYCRZR Senior Member FCBO Gold Member

    Messages:
    1,494
    Likes Received:
    2062
    Joined:
    May 13, 2015
    Location:
    Fargo, ND
    My counterweight is a little different than what the manual shows. I have no up or down as it is eccentric.
    image.jpg

    The picture in the service manual shows the Counter weight up when cold. As the thermostat spring heats up I believe it allows the Counterweight to over come the spring force and rotate down. I am not 100% sure for 65 but I think it is very similar. You should be able to down load a 65 service manual for free
    image.jpg
     
  14. HWYCRZR

    HWYCRZR Senior Member FCBO Gold Member

    Messages:
    1,494
    Likes Received:
    2062
    Joined:
    May 13, 2015
    Location:
    Fargo, ND
  15. mathiew

    mathiew Member

    Messages:
    52
    Likes Received:
    3
    Joined:
    Oct 19, 2017
    Location:
    Canada
    Thank, I think it’s not my heat riser, I want to try a phenolic spacer, this will fit? Do I have a rochester carb?

    3596971B-F836-4C56-8EF6-53057D2032B6.png