350 sbc runs rough and blows smoke

Discussion in 'Engine Topic' started by Justin Berke, Jan 16, 2019.

  1. Justin Berke

    Justin Berke New Member

    Messages:
    26
    Likes Received:
    1
    Joined:
    Jan 11, 2019
    Location:
    British Columbia
    Problem solved, rebuilt the carb and the primary float bowl was stuck. It Idles way better but the float level still seems to be pretty high. The secondary was fine the the float level is normal. I tried adjusting the float level and idle mixture screw but nothing happens.
     
  2. Bandit723

    Bandit723 Veteran Member

    Messages:
    3,141
    Likes Received:
    462
    Joined:
    Oct 1, 2016
    Location:
    Waupaca WI
    According to Holley. If you turn your idle mixture screws in all the way and the engine still idles then it may be a blown power valve. Without knowing the history of this sometimes the float adjustment may take a couple of go's.
     
  3. pitt16

    pitt16 Real 26/28

    Messages:
    28
    Likes Received:
    6
    Joined:
    Jan 26, 2007
    Location:
    Spring Hill,Florida
    What did the plugs you took out look like?
     
  4. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

    Messages:
    10,155
    Likes Received:
    395
    Joined:
    Nov 4, 2004
    Location:
    Ringgold, GA
    If the float was stuck, your freed it, and you're having problems adjusting the float level, you probably have a damaged needle/seat unit. Fix that first, then move the the idle screws. Factory adjustment is 1 1/2 turn out from fully closed.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.