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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 > Intermittent Jerk/Misfire Datalog avaliable



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      08-08-2022, 10:55 PM   #1
Pulstura
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Drives: BMW 335i E91
Join Date: Aug 2022
Location: New Zealand

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Intermittent Jerk/Misfire Datalog avaliable

Hi all,

I've got this strange issue where my N54 E91 wagon does this intermittent jerk/misfire in the highway. I'm starting to think this issue only occurs when the engine is warm and it's not under wide open throttle.

I've cleaned my vanos solenoids and put them back in and waiting for new coils and plugs to arrive so I could replace them.

Has anyone seen datalogs similar to what I'm getting? I see both Vanos intake/exhaust spike as well as cylinder timing. Fuel Rail pressure and LPFP seem to also spike at the same time.
At one instance you can also see the RPM dip down from 2.5k to 1.2k in a split second

https://datazap.me/u/pulstura/misfir...13-23-24-25-26

Thanks
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