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      11-22-2012, 10:31 AM   #2
doug_999
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Drives: 2011 1M/2021 992/2023 X3
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That's kind of cool! It has to be something with either the airbox and/or wastegates. I would try without airfilter and see if that makes a difference - if it doesn't make a difference then I think you might have an issue with the turbo.
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