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      04-13-2014, 05:32 PM   #1
Noobieforlife335
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Drives: e90 335i
Join Date: Jun 2013
Location: seattle

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2007 bmw 335i  [8.00]
335i weird noise help

My 335i is a 2007 with almost 100k on the clock.
When cobb tune is active, under heavy acceleration the car will produce a loud squealing like sound from what appears to be the front right of the engine bay.
When the car has no tune it produces no foul noise. Im attaching a bunch of logs that hopefully people that know much more than I can look at and find the problem

logs 1-3 are stock tune for a control test
logs 4-6 are done on the stage 1 lt sport tune
logs 7-9 are done on stage 1 st sport

All variables such as road, weather, oil temp are constant.

Thanks for any help !
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