"Thwap" Sound
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Join Date: Feb 2014
Location: Adelaide, South Australia
Posts: 8,510
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Sounds like the classic worn supercharger coupler/torsion isolator issue, search around under "torsion isolator" and "supercharger coupler".
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Edit: Oh...Oh...Oh! It might be the valves on the adjustable suspension changing position after losing electrical power.
Last edited by Unhingd; 09-18-2017 at 09:19 AM.
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Yes they are. However, trying to triangulate external sources of noise from inside the cabin is always challenging.
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