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B21 · 11-29-2022, 10:37 AM

Well it could have been modified and that's the cause..it could be a boost leak but then normally you would get an error fault...could be the turbo is on the way out..normally 28i don't really whistle..perplexed..

11-29-2022, 10:37 AM	#4
B21 Captain 153 Rep 611 Posts Drives: E89 Atacama Yellow 35is Join Date: May 2022 Location: Scotland..God’s own country iTrader: (0)	Well it could have been modified and that's the cause..it could be a boost leak but then normally you would get an error fault...could be the turbo is on the way out..normally 28i don't really whistle..perplexed.. __________________ Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0 Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
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