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Noise Under Hood

Discussion in '2.3L EcoBoost I-4 Engine Modification/Discussion' started by PSSST, Feb 2, 2017.

  1. PSSST

    PSSST New Member

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    Feb 2, 2017
    I have a 2016 EB Premium with the FP CAI and tune. I'm hearing a single "pop" noise coming from under my hood. It seems to happen when I let off the gas and the boost drops and goes into the negative side. I also can hear this sitting still in my driveway after revving the engine, I will hear it shortly after it returns to idle. It almost sounds as if there is a check valve closing or something. Has anyone else heard this under their hood?

    Any input would be greatly appreciated!
     
  2. Willie2

    Willie2 Well-Known Member Premium Member Established Member

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    Jul 23, 2008
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    Houston
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