BMW M3 Forum (E90 E92) - View Single Post - Engine emits rattling noise between 2k to 3k rpm

Cwleo · 11-03-2016, 09:49 AM

It sounds a bit more sinister than air flow resonance. Sounds metallic imo...

The fluttering sounds seems to be less sIgnificant when using a higher octane fuel. Would this mean engine knocking at lower octane fuel?

11-03-2016, 09:49 AM	#26
Cwleo New Member 2 Rep 11 Posts Drives: E90 m3 Join Date: Dec 2015 Location: Malaysia iTrader: (0)	It sounds a bit more sinister than air flow resonance. Sounds metallic imo... The fluttering sounds seems to be less sIgnificant when using a higher octane fuel. Would this mean engine knocking at lower octane fuel?
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