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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 > Hesitation and super knock



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      05-11-2020, 03:50 AM   #1
kaden_o11
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Hesitation and super knock

Recently been getting some hesitation under hard acceleration in 2nd to 3rd gear at mid rpms. Doesn't happen consistently but often after driving car for fair amount of time. Seem to get good boost towards start of my trips, then can't even pull 10psi after a while

Shadow codes currently:
2AAF - DME: Fuel pump, plausibility.
2FA3 - DME: No coding.
2FCA Fuel high pressure bei Freigabe der Einspritzung
30ED - DME: Superknocking, cylinder 1.
30F2 - DME: Superknocking, cylinder 6.

MHD Stage 1+, intercooler, chargepipe, intake
Running ACN91/CAD94 tune with chevron 94

Spark plugs were replaced 7000km, but thinking I may need to put in 1 step colder. Replacing coils within next week or so as well.

Heres a log of a 3rd gear pull with hesitation
https://datazap.me/u/kaden-oseen/los...-6-15-16-24-25

Thanks in advance guys!
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      05-13-2020, 06:11 PM   #2
335e92tx
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Quote:
Originally Posted by kaden_o11 View Post
Recently been getting some hesitation under hard acceleration in 2nd to 3rd gear at mid rpms. Doesn't happen consistently but often after driving car for fair amount of time. Seem to get good boost towards start of my trips, then can't even pull 10psi after a while

Shadow codes currently:
2AAF - DME: Fuel pump, plausibility.
2FA3 - DME: No coding.
2FCA Fuel high pressure bei Freigabe der Einspritzung
30ED - DME: Superknocking, cylinder 1.
30F2 - DME: Superknocking, cylinder 6.

MHD Stage 1+, intercooler, chargepipe, intake
Running ACN91/CAD94 tune with chevron 94

Spark plugs were replaced 7000km, but thinking I may need to put in 1 step colder. Replacing coils within next week or so as well.

Heres a log of a 3rd gear pull with hesitation
https://datazap.me/u/kaden-oseen/los...-6-15-16-24-25

Thanks in advance guys!
This thing doesnt look happy. Your getting retards at 1/2 boost. What is the age of this thing in miles? does it use oil?


how long have you had it?
https://datazap.me/u/kaden-oseen/los...-28&zoom=25-53
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'13 335IS N54 (1 of 373 LeMans Blue out of 3597 total production e92)- Grey interior (1 of 24 in LMB with any trans- 1 of 14 with DCT)-MODS -MFactory LSD/MHD-BQ custom Tune/ATM-IC/AFE Momentum GT Intake/Konis/Mfront&HeimJoint Rear rods&arms/Brembos.
https://photos.app.goo.gl/Lo6aHZRo7XqtPkhL8
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      05-14-2020, 06:39 PM   #3
kaden_o11
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Quote:
Originally Posted by 335e92tx View Post
This thing doesnt look happy. Your getting retards at 1/2 boost. What is the age of this thing in miles? does it use oil?


how long have you had it?
https://datazap.me/u/kaden-oseen/los...-28&zoom=25-53
Hey thanks for reply, 95k miles, figured out the issue... Previous owner had JB+ installed. Removed it and car is running like a dream, logs looking great now and getting full boost
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