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350 sbc runs rough and blows smoke

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

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  1. Jan 28, 2019 #41
    Justin Berke

    Justin Berke New Member

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    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. Jan 28, 2019 #42
    Bandit723

    Bandit723 Veteran Member

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    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. Jan 28, 2019 #43
    pitt16

    pitt16 Real 26/28

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    What did the plugs you took out look like?
     
  4. Jan 29, 2019 #44
    CorkyE

    CorkyE Veteran Member Lifetime Gold Member

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    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.
     
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