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      09-19-2018, 08:05 PM   #27
kimiraikkonen
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Drives: 2008 E90 M3 6MT
Join Date: Jun 2016
Location: San Francisco

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Quote:
Originally Posted by Scharbag View Post
I have looked about and have had a bit of a hard time finding info about a noise I am getting at low RPM when I accelerate hard (lug the engine). I think I found a few threads that imply that this can cause some strange noises. Was hoping for some more information.

So my problem is pre-detonation. It is strange because if I run the factory 241 software, the problem goes away. If I try to run the Alpine tune from Alex, I get nasty pre-det at low RPM and some pre-det at higher RPM when accelerating hard.

My plugs all look really good. The only strange thing I have on my car are the Dinan throttle-bodies that the previous owner installed. Intake is a Dinan filter assembly so that really should not change much.

Thanks for the help and I will try to get a video at some point.

Cheers,
Hi. Have you ruled out an exhaust leak? Might be worth to have a smoke test....coudl be a pinhole leak on the clamps.
Appreciate 0