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09-12-2013, 02:14 AM | #1 |
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Found out it was a broken tensioner pulley, easy fix, all better now.
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2011 BMW X5//M
2008 E90 M3 - 6MT - AA Gen 2 Level 3 1991 Hot Girlfriend Last edited by DrakeKemper; 11-08-2014 at 11:53 PM.. |
09-12-2013, 07:15 AM | #2 |
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Drives: '09 E92 M3 IB/'17 f85 X5M LBB
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Sounds more like an air leak. Make sure that everything and all of the hoses and lines are tight. It sounded loud right by the intake hose.
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09-12-2013, 08:32 AM | #3 |
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Kinda sounds like the bypass valve is fluttering.
You can try unplugging the vacuum hose on the bypass valve to confirm whether its that or not. If it is the bypass valve, most more than likely you have a vacuum leak somewhere that is causing the piston inside the valve to fluctuate. Last edited by Wei718; 09-12-2013 at 08:46 AM.. |
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09-12-2013, 11:36 PM | #6 |
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Noticed under very light revs it does speed up the sound, but either disappears or gets drowned out by the exhaust by about 2k RPMs
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2008 E90 M3 - 6MT - AA Gen 2 Level 3 1991 Hot Girlfriend |
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