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Loud whistle/ squealing

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Old 10-27-2023, 03:42 AM
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Default Loud whistle/ squealing

Good morning,
My 2014 RS7 had and still has an issue that started Yesterday. out of no where this squealing/whistle noise was coming from from left of engine. Sound closer to turbo area. When Accelerating the noise goes away, or minimizes. I noticed a horsepower change as well. Thank you for Any input!
Old 10-29-2023, 11:57 AM
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Pull the oil cap while running and see if it goes away. If it does then it’s likely the PCV.
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