Stuttering During Regeneration: Which MWB Logs?

Good morning!

My Polo 9N3 (1.4 TDI, 3-cylinder BWB, mileage: 214,000 km, with a recently refurbished cylinder head) has been shaking more noticeably lately during the DPF regeneration process.

Ich möchte während der Fahrt mal die interessanten MWB loggen. WWhat would those be?
And where can I find information about when the next regeneration is scheduled?

Thank you and best regards.
Volker.

Hello,

Please always include an Autoscan report with such questions, because otherwise you either have to guess or do extensive research to find out which control units are installed, instead of simply seeing them.

Best regards, Rainer.

dieselschrauber wrote:

Hello, Please always include an Autoscan report when asking questions, because otherwise you either have to guess or do extensive research to find out which control units are installed, instead of simply seeing them. Best regards, Rainer

Oops, sorry!

Code:

Mittwoch,22,Januar,2014,17:03:08:25065 VCDS -- Windows-basierter VAG/VAS-Emulator VCDS Version: 12.12.0.0 Datenstand: 20131116 Fahrzeug-Ident.-Nr.: WVWZZZ9NZ8Bxxxxxx   KFZ-Kennzeichen: Kilometerstand: 214500km   Reparaturauftrag: Fahrzeugtyp: 9N (9N - Polo()) Scan: 01 03 08 09 15 17 19 25 44 46 76 Fahrzeug-Ident.-Nr.: WVWZZZ9NZ8Bxxxxxx   Kilometerstand: 214500km ------------------------------------------------------------------------------- Adresse 01: Motorelektronik        Labeldatei: RKS\045-906-013-BMS.clb    Teilenummer SW: 045 906 013 E    HW: 045 906 013 E    Bauteil: R3 1,4L EDC G000SG  4271     Revision: --H03---    Seriennummer: VWZ7Z0G5933092    Codierung: 0003071    Betriebsnr.: WSC 49000 143 80495    VCID: 112F82EC0B0893960BD-513C Kein(e) Fehlercode(s) gefunden. Readiness: 0 0 0 0 1 ------------------------------------------------------------------------------- Adresse 03: Bremsenelektronik        Labeldatei: RKS\6R0-907-37x-ESP80.lbl    Teilenummer SW: 6Q0 907 379 AS    HW: 6Q0 907 379 AS    Bauteil: ESP 8.0 front   H05 0003     Revision: 00000000    Seriennummer: 00000000000000    Codierung: 0002365    Betriebsnr.: WSC 00046 412 00000    VCID: 8E1519909A360C6E96F-515A Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 08: Klima-/Heizungsel.        Labeldatei: RKS\6Q0-820-045.lbl    Teilenummer: 6Q0 820 045    Bauteil: Klimaanlage        X0850     VCID: EADD7500961E804EAA7-5178 Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 09: Zentralelektrik        Labeldatei: RKS\6Qx-937-049-C.lbl    Teilenummer: 6Q1 937 049 F    Bauteil: 0009 BN-SG.         2S36     Codierung: 09646    Betriebsnr.: WSC 00046     VCID: 3E7509503A165CEEA6F-515A Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 15: Airbag        Labeldatei: RKS\6Q0-909-605-VW5.lbl    Teilenummer: 1C0 909 605 K    Bauteil: 19 AIRBAG VW51 0P   0010     Codierung: 12601    Betriebsnr.: WSC 00046     VCID: 2C513318DC6ADE7E18B-515A Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 17: Schalttafeleinsatz        Labeldatei: RKS\6Q0-920-xxx-17.lbl    Teilenummer: 6Q0 920 825 F    Bauteil: KOMBIINSTRUMENT VDO V06     Codierung: 01132    Betriebsnr.: WSC 00000     VCID: 377B1C74152C6DA6659-515A Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 19: Diagnoseinterface        Labeldatei: RKS\6N0-909-901-19.lbl    Teilenummer: 6N0 909 901    Bauteil: 01K1 GATEWAY CAN    2S36     Codierung: 00014    Betriebsnr.: WSC 00046     VCID: F0E96768B0C27A9EE43-5178 Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 25: Wegfahrsperre        Labeldatei: RKS\5J0-920-xxx-25.clb    Teilenummer: 6Q0 920 825 F    Bauteil: IMMOBILIZER VDO V06     Codierung: 01132    Betriebsnr.: WSC 00000     VCID: 377B1C74152C6DA6659-5178    WVWZZZ9NZ8B031810     VWZ7Z0G5933092 Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 44: Lenkhilfe        Labeldatei: RKS\6Q0-423-156.clb    Teilenummer: 6Q0 423 156 AB    Bauteil: LenkhilfeTRW        V270     Codierung: 10110    Betriebsnr.: WSC 00046     VCID: 6FEBE4142DFCE5667D9-5178 Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 46: Komfortsystem        Labeldatei: RKS\6Q0-959-433.lbl    Teilenummer: 6Q0 959 433 E    Bauteil: 3F Komfortgerát     0002     Codierung: 00019    Betriebsnr.: WSC 00046     VCID: 3D770E5C371047F6BF5-4B32 Kein(e) Fehlercode(s) gefunden. ------------------------------------------------------------------------------- Adresse 76: Einparkhilfe        Labeldatei: RKS\7H0-919-283.lbl    Teilenummer: 7H0 919 283 A    Bauteil: Parkingsyst. 24 KUH 402     Codierung: 00102    Betriebsnr.: WSC 00046     VCID: 30692768F042BA9E243-5178 Kein(e) Fehlercode(s) gefunden. Ende   --------------------------------------------------------------------

Hello,

For those interested in the regeneration process itself, data blocks 67-70 are particularly relevant.

Jerking/Hesitation: Also, please also consider the engine mounts or the ash level in the DPF. At this mileage, the DPF should have already been replaced or cleaned.

If the "jerking" only occurs during regeneration, you can also log value 1 in measurement block 10. If there are "drops" in the values, the cause could be a clogged DPF, as this can sometimes trigger the turbocharger to pump in certain operating conditions.
Typically, this occurs at low engine speeds and low ambient air pressure, with a low air mass flow but a high boost pressure requirement.

See also:
I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

Best regards, Rainer.

dieselschrauber wrote:

Hello, For those interested in the regeneration process itself, data blocks 67-70 are particularly relevant. Jerking/Hesitation: Also, please also consider the engine mounts or the ash level in the DPF. At this mileage, the DPF should have already been replaced or cleaned. If the "jerking" only occurs during regeneration, you can also log value 1 in measurement block 10. If there are "drops" in the values, the cause could be a clogged DPF, as this can sometimes trigger the turbocharger to pump in certain operating conditions. Typically, this occurs at low engine speeds and low ambient air pressure, with a low air mass flow but a high boost pressure requirement. See also: I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL. Best regards, Rainer

Hello Rainer,

Thank you for your feedback!
I would like to rule out engine mounts for now, as the jerking only occurs during regeneration.
And the DPF hasn't been replaced yet, I'm curious to see what the diagnostic readings say. However, I imagine that in my case, it's not yet at the point where it needs to be replaced, because I drive 55,000 km per year.

It could actually be something real... I think.

I will report!

I have created the log and posted it under the link mentioned above.

Can you tell me something about the condition of the DPF, Rainer?

Best regards,
Volker

Hello,

Quote:

up to 90 mbar differential pressure

Regarding the condition of the DPF, the following can be said:
- Either the 1.4 TDI received the same DPF (Diesel Particulate Filter) as the 1.9/2.0 TDI engines, which results in lower exhaust emissions and less ash buildup due to reduced oil/fuel consumption, thus explaining the low differential pressure.
- Or, the DPF (Diesel Particulate Filter) is not in perfect condition, meaning the ceramic component has cracks.

Whether it's the former or the latter, for the engine's perspective, there is no need for action regarding the DPF. If the rear is black, the latter is likely to be the case.

Consequently, if the rear of the unit is not black and all openings on the DPF are properly screwed/sealed, including the lines to the differential pressure sensor, then everything is fine with the DPF.

Only in the event that the ash mass exceeds the limit, should this value be moderately reset (halved), so that the engine control unit does not solely rely on the programmed ash mass to initiate regeneration cycles, which could then lead to a visit to the workshop.

Best regards, Rainer.

Hello Rainer,

Thank you for your assessment!
The rear is completely free of soot, which is a relief!

Best regards, Volker.