Misfire on cylinder 2 no fault codes

[vampym6]

Hey guys!

New to this forum.
Ive had my M6 f13 2013 trouble free for 2 years of which 6 months stage 2 custom tune.
It is also catless and straight piped (about 18 months ago)

But one month ago during some very rough and hard driving i suddenly felt the car shake.
I could also hear in the exhaust that there was a (what i tought) misfire.
I got it diagnosed the same day and there where no fault codes.

Changed al injectors coils and spark plugs, these are also gapped to 0.022.
Also lamba sensors are changed and the compression test was good.

So one month further still no real solution. just that we know it misfires on cilinder 2.
The software is the latest version and we also flashed it back to stock and it was the same.

Does anyone here have any tips? Would be apreciated.

thank you very much!

[BBHMM]

Originally Posted by vampym6

Hey guys!

New to this forum.
Ive had my M6 f13 2013 trouble free for 2 years of which 6 months stage 2 custom tune.
It is also catless and straight piped (about 18 months ago)

But one month ago during some very rough and hard driving i suddenly felt the car shake.
I could also hear in the exhaust that there was a (what i tought) misfire.
I got it diagnosed the same day and there where no fault codes.

Changed al injectors coils and spark plugs, these are also gapped to 0.022.
Also lamba sensors are changed and the compression test was good.

So one month further still no real solution. just that we know it misfires on cilinder 2.
The software is the latest version and we also flashed it back to stock and it was the same.

Does anyone here have any tips? Would be apreciated.

thank you very much!

just curious how many HP you have on your tune?

[vampym6]

Originally Posted by BBHMM

just curious how many HP you have on your tune?

710 hp and 890nm of torque

[Mdriv3r]

Do you have ISTA+ ? Or carly? This may help...

Have you checked and cleaned the MAFs and air intake boots?

My last suggestion is possibly gapping to 0.020. Its kind of alot of work, so Id do that last. Maybe keep talking with your tuner about it. Im gapped at 0.020 with ngk one step colder and it works for me. Tuned also, etc.. with catless dp.