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      02-25-2020, 11:52 PM   #23
m.hlavik@gmail.com
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Drives: E92 M3 competition edition
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Quote:
Originally Posted by Alex@Alpine View Post
Quote:
Originally Posted by Redd View Post
The guys in this thread seem to be experiencing something similar - bad knock under 3500 rpm, especially in areas with bad fuel. All are running Alpine tune.

https://www.m3post.com/forums/showthread.php?t=1532390

Sounds like the Alpine tune may be super aggressive. Have you tried pouring in a bottle of octane booster and see if that helps?
If you read further into the thread you have quoted you will see the problem was not knock. Even in the event of bad fuel the car will still pull timing with the motor tune.

In the case of the OP here he can rule out the tune by just simply flashing back to stock and see if he still has the problem.
ok noted. thanks to everybody guys