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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > My CBU cleaning experience



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      06-14-2018, 11:45 AM   #133
canam_banana
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Referral for Indy Shop(s) in CA for CBU

Thanks for the reply and pointers, rbreding.

Would you have some recommendations for indy shops in the Bay Area in CA? I'd appreciate any referrals. (I wonder if they would do as good a job as the pictures shared here by the guys doing the soda cleaning and sonic cleaning as shown by lee4him and mike325.)

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Originally Posted by rbreding View Post
Indy pricing in Kalifornia has show to be around $1000 for a good job. There are shops charging less but work has been suspect or confused for a gasser.

After you have it cleaned why not have a simple stage 1 tune to turn off the EGR and keep all your emissions equipment intact. This will eliminate the major culprit of CBU. Since the EGR is still there and all readiness will show you should pass SMOG without an issue even at a legit SMOG shop.

I would consider meth on a stock vehicle a waste of money really. Just do the above.

Last edited by canam_banana; 06-14-2018 at 06:33 PM.
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      07-22-2018, 06:12 PM   #134
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https://photos.app.goo.gl/hsFTc9gLCTiRau3d7

Ports at 146K miles (335d)--never been CBU cleaned.
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Last edited by nicklockard; 10-08-2018 at 10:49 AM.
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      10-06-2018, 07:24 PM   #135
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Adaptation reset updat

I learned something new about the adaptation reset today. A friend visited me after cleaning the CBU and had a very rough engine idle. He had the following faults set:
0x004596 4596 Smooth running controller, cylinder 3
0x00459C 459C Smooth running controller, cylinder 1
0x004AD5 DDE: Zero-quantity adaptation, injector, cylinder 1
0x004AF6 DDE: Zero-quantity adaptation, injector, cylinder 3
0x004CE3 DDE: Misfire detection, cylinder 3

We reset all adaptations with ISTA but it didn't really help much, we could still feel the engine shaking in the drivers seat. It wasn't until I reset the correction values of the injectors that the engine finally ran smooth again. It was a night and day difference. Below is the job in ISTA which really should be part of the Adaptation chapter but is hidden further down.
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      10-14-2018, 12:20 PM   #136
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Very nice
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