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      10-24-2019, 03:38 PM   #861
M.Hagen
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Drives: 2009 E90 M3
Join Date: Oct 2013
Location: Layton, UT

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Quote:
Originally Posted by Bakerboy View Post
Could it be the throttle bypass valve?
Maybe. I don't know what audible noises the bypass valve makes when it opens/closes.

I tried a hard launch today and replicated the noise, it only lasted for about 1-2 minutes this time.

I'll do it again and record the audio.
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