I was helping out to find out why this poor V6 ASN engine is misfiring BADLY on bank 2. With engine idling, cylinders 4-5-6 generate misfirings faster than I can read them out. Bank 1 cylinders 1-2-3 stay at zero. Has new coils and plugs. No other fault codes than misfires (see scan at bottom). Runs very rough and won't rev, undriveable at the moment.
When looking at fuel trim and lambda control, I found out that other bank is rich while other is lean. But what bothers me, is fuel trim. Yes, they go to zero when DTC memory is cleared. But below are readings after more than 15 minutes of idling, they are still at zero. Just out of curiosity, what possible reasons are there for this? Or is this normal? So far every time I have seen mixture issues, the idle adaptation starts to creep away from zero immediately after DTC clear, when engine is running.
We did of course try shutting off lambda control to see if that helps engine run better (did not help) but after that, ignition was cycled several times and still all zero fuel trims.
I am aware that there are numerous possibilities that cause misfiring on these engines. One of them is cam timing. Can anyone verify if readings below look to be okay? I think they are within specs, but I have very little knowledge of this.
Sadly, the current owner has just bought the car (in "as is" condition) and has very little knowledge of history. Only certain things are, that plugs and coils have been replaced. One thing that popped out, that could there be a blocked catalytic converter causing this...? Exhaust pipes seem to go separately all the way to the back, so a blockage on the other side would affect only one bank..?
We'll see if the owner gets the exhaust pipe inspected for blockage. But my main question at the moment is that fuel trim sitting at zero behaviour. Is it normal in this situation or does it indicate something?
When looking at fuel trim and lambda control, I found out that other bank is rich while other is lean. But what bothers me, is fuel trim. Yes, they go to zero when DTC memory is cleared. But below are readings after more than 15 minutes of idling, they are still at zero. Just out of curiosity, what possible reasons are there for this? Or is this normal? So far every time I have seen mixture issues, the idle adaptation starts to creep away from zero immediately after DTC clear, when engine is running.
We did of course try shutting off lambda control to see if that helps engine run better (did not help) but after that, ignition was cycled several times and still all zero fuel trims.
Code:
Wednesday,08,May,2019,16:34:13:26429
VCDS -- Windows Based VAG/VAS Emulator Running on Windows XP x86
VCDS Version: 18.9.1.0 HEX-V2 CB: 0.4436.4
Data version: 20190114 DS296.0
www.Ross-Tech.com
VIN: WAUZZZ8E02A171553 License Plate:
Address 01: Engine (8E0 909 559 )
16:34:06 Group 032: Lambda Control (Mixture Adaptation)
0.0 % Adaptation (Idle) Bank 1 Sensor 1
0.0 % Adaptation (Partial) Bank 1 Sensor 1
0.0 % Adaptation (Idle) Bank 2 Sensor 1
0.0 % Adaptation (Partial) Bank 2 Sensor 1
16:34:06 Group 033: Lambda Control
7.8 % Lambda Control Bank 1 Sensor 1
1.520 V Sensor Voltage Bank 1 Sensor 1
-14.8 % Lambda Control Bank 2 Sensor 1
1.520 V Sensor Voltage Bank 2 Sensor 1I am aware that there are numerous possibilities that cause misfiring on these engines. One of them is cam timing. Can anyone verify if readings below look to be okay? I think they are within specs, but I have very little knowledge of this.
Code:
Wednesday,08,May,2019,16:13:29:26429
VCDS -- Windows Based VAG/VAS Emulator Running on Windows XP x86
VCDS Version: 18.9.1.0 HEX-V2 CB: 0.4436.4
Data version: 20190114 DS296.0
www.Ross-Tech.com
VIN: WAUZZZ8E02A171553 License Plate:
Address 01: Engine (8E0 909 559 )
16:13:19 Group 091: Continuous Camshaft Adjustment (Intake - Bank 1)
720 /min Engine Speed (G28)
16.1 % Engine Load
0.0°KW Adjustment Bank 1 (specified)
-1.0°KW Adjustment Bank 1 (actual)
16:13:19 Group 092: Continuous Camshaft Adjustment (Intake - Bank 2)
760 /min Engine Speed (G28)
16.1 % Engine Load
0.0°KW Adjustment Bank 2 (specified)
-1.5°KW Adjustment Bank 2 (actual)
16:13:19 Group 093: Continuous Camshaft Adjustment (Phase Position)
7.0°KW Phasenlage Intake Bank 1
4.0°KW Phasenlage Intake Bank 2
8.0°KW Phase Position Bank 1
9.0°KW Phase Position Bank 2Sadly, the current owner has just bought the car (in "as is" condition) and has very little knowledge of history. Only certain things are, that plugs and coils have been replaced. One thing that popped out, that could there be a blocked catalytic converter causing this...? Exhaust pipes seem to go separately all the way to the back, so a blockage on the other side would affect only one bank..?
We'll see if the owner gets the exhaust pipe inspected for blockage. But my main question at the moment is that fuel trim sitting at zero behaviour. Is it normal in this situation or does it indicate something?
Code:
Wednesday,08,May,2019,16:08:24:26429
VCDS -- Windows Based VAG/VAS Emulator Running on Windows XP x86
VCDS Version: 18.9.1.0 HEX-V2 CB: 0.4436.4
Data version: 20190114 DS296.0
www.Ross-Tech.com
VIN: WAUZZZ8E02A171553 License Plate:
Mileage: 224910km-139752mi Repair Order:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
67 69 75 76 77
VIN: WAUZZZ8E02A171553 Mileage: 224910km-139752miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 06C-909-559-ASN.lbl
Part No SW: 8E0 909 559 HW: 8E0 909 059
Component: 3.0L V6/5V G 0004
Coding: 0011711
Shop #: WSC 63351 000 00000
VCID: 72BD270A28B95247989-5160
4 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 -
16688 - Cylinder 4
P0304 - 001 - Misfire Detected
16690 - Cylinder 6
P0306 - 001 - Misfire Detected
16689 - Cylinder 5
P0305 - 001 - Misfire Detected
Readiness: 0110 1101
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: None
VCID: 55F77C96BC17257F9DB-51F2
No Faults Found
or DTCs not supported by controller
or a communication error occurred
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8E0-820-043.lbl
Part No: 8E0 820 043 E
Component: A4 Klimaautomat 0712
Coding: 00000
Shop #: WSC 63351
VCID: 2313124EA2C38BCFA3F-5160
1 Fault Found:
01592 - Air Quality Sensor (G238)
30-00 - Open or Short to Plus
-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 8E0-907-279-8E2.lbl
Part No: 8E0 907 279 E
Component: int. Lastmodul RDW 0305
Coding: 00011
Shop #: WSC 63351
VCID: 3431E112172D1C774A5-4B00
1 Fault Found:
01504 - Bulb for License-Plate Light (X)
57-00 - Electric Circuit Failure
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8E0-959-655-84.lbl
Part No: 8E0 959 655
Component: Airbag 8.4E 4001
Coding: 0010602
Shop #: WSC 63351 000 00000
VCID: 74B1211252AD5C778A5-5160
No fault code found.
-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 8E0-953-549.lbl
Part No: 8E0 953 549 L
Component: Lenksáulenmodul 0308
Coding: 00042
Shop #: WSC 63351
VCID: 3C21C9323F7DD437825-4B00
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8E0-920-9xx-8E2.lbl
Part No: 8E0 920 900 H
Component: KOMBI+WEGFAHRS. RB4 D26
Coding: 01000
Shop #: WSC 65535
VCID: 290F0066C0EF519FE93-5160
WAUZZZ8E02A171553 AUZ6Z0A0321646
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels:. 8E0-959-433-MAX.clb
Part No: 8E0 959 433 AF
Component: Komfortgerát T03 0315
Coding: 06976
Shop #: WSC 63351
VCID: 75B71C165CD7457FBDB-4B00
Subsystem 1 - Part No: 8E1959801
Component: Tõrsteuer.FS BRM 0002
Subsystem 2 - Part No: 8E1959802E
Component: Tõrsteuer.BF BRM 0002
Subsystem 3 - Part No: 8E0959801A
Component: Tõrsteuer.HL BRM 0002
Subsystem 4 - Part No: 8E0959802A
Component: Tõrsteuer.HR BRM 0002
2 Faults Found:
01561 - Rear left door
61-00 - Won't De-Safe
01562 - Rear right door
61-10 - Won't De-Safe - Intermittent
-------------------------------------------------------------------------------
Address 55: Headlight Range Labels: 4Z7-907-357.lbl
Part No: 4Z7 907 357
Component: dynamische LWR D06
Coding: 00060
Shop #: WSC 63351
VCID: 045171D2073D6CF7BA5-4B9A
1 Fault Found:
01534 - Control Circuit for Left Headlight Range Adjusting Motor (V48)
30-00 - Open or Short to Plus
-------------------------------------------------------------------------------
Address 56: Radio Labels: 8E0-035-1xx-56.lbl
Part No: 8E0 035 152
Component: chorus II GRO 0007
Coding: 00000
Shop #: WSC 63351
VCID: 5DE764B6C417FD3FD5B-4B1E
1 Fault Found:
01317 - Control Module in Instrument Cluster (J285)
49-10 - No Communications - Intermittent
End----(Elapsed Time: 05:48, VBatt start/end: 11.9V/11.9V. VIgn 11.9V)-----
