Noise (like a bang) from Breathing System

Discussion in 'Engine, Fuel and Exhaust' started by emi_24it, Oct 13, 2008.

  1. emi_24it

    emi_24it New Member

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    Is it normal that on my 1999 Flstc EVO, I can hear sometime expecially when the engine is cold, some bangs coming from the umbrella valves, and I feel a lot of air coming out from the air filter
     
  2. emi_24it

    emi_24it New Member

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    I have got an 38mm Edelbrock carburator Quick silverII, But I had this problem since I was with the CV carburator
     
  3. 07FLHX

    07FLHX Member

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    This can also be caused by a leak in the intake manifold. Or a leaking vacuum line from the carb to the petcock (if your using the stock vacuum petcock) Look for this type of problem before changing jets, as uping the jet could just mask the problem and not really fix it.
    Good Luck!
    Dave
     
  4. Z-Man

    Z-Man Member

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    Don't forget to chech the timing while you're at it.
     
  5. emi_24it

    emi_24it New Member

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    Ok I'll check what you all said to me, I will let you know soon...

    Thank you
    Emiliano