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      08-30-2019, 03:51 PM   #17
LBB M2 N55
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Drives: 2017 M2
Join Date: Aug 2019
Location: Belgium

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Hey guys, since it's been 2 years since this post was active. Has any of you experienced any fixes or further issues?

I just got myself a 08/2017 M2 and installed a catless downpipe, intercooler and chargepipe. Car is running standard ECU as of now but I'm facing exactly the same issue.

Tacho doesn't move, yet a very noticible change in sound on idle... Car runs smooth for 2 sec then gets louder for 1 sec and so on...

A lot of friends with similar setups on their M2's don't get this... Which is the worrying part for me and makes me think there's something wrong with mine...

I was planning on tuning and further modding the car but now I'm afraid as the car still has 1 year of warranty and don't want to permanently void this just as the engine starts acting weird...

I'd be really appreciative of any help or possible causes or ways to resolve this.
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