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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Pop on cold start and rough idle + vibrations - N54



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      10-23-2023, 10:48 AM   #23
SlowE92
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Quote:
Originally Posted by Sauryy View Post
Hi, i will check out all hoses, it should be vacuum and intake hoses?
- I got two new log
a) one is WOT on 4. gear
b) Warm up idle

- All of logs were made on DocVu custom flash. Can you please check again?
- My decision is the DocVu flash make car slower, stage 2+ from MHD feels more powerful for me, because its have more low-end torque, turbos have high mileage they might not be capable of reaching target boost?

https://datazap.me/u/sauryy/index-12...24-25-27-28-29
I'm not the best at reading logs but your AFR looks fine. Your soft term fuel trims are somewhat normal at idle (STFT) but look a little wonky during pulls and driving. Your LTFT are slightly high during idle though. In my experience is indicates either 02 sensor, boost leak, or needing an intake cleaning. Since you have never had an intake cleaning done on your car I'd lean more towards that.
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2007 E92 335i - MHD, Turbo Technics 19T's
2008 E60 535XI - JB4
2010 E92 335i - JB4, Borg Warner EFR 8374

Last edited by SlowE92; 10-23-2023 at 10:56 AM..
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      10-27-2023, 02:39 PM   #24
Sauryy
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So, i found out. Thé Burger Motorsport cones was completely dirty, so i exchange them for new And vibrations are gone.
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