07 Jetta 2.5 running rough - need help.

   #1  

fin reaper

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Hi, my 2007 2.5L jetta-running rough! Please help
Codes show it's running lean. When I cold start my car the first 10 seconds run really rough, rpms drop up and down and half the time the car dies. Once it gets going though it starts running really good. We have replaced valve cover (pcv), replaced purge solenoid, replaced the MAF sensor, did a smoke test and found no leaks in the intake system and also pulled and cleaned the throttle body.

VCDS log and fault codes below. Any suggestions?

VCDS 031 032 measuring block log
Address 01: Engine (07K 906 032 T)

17:19:00 Group 031
0.984 Lambda Sensor Current Value
1.000 Lambda Sensor Specified Value


17:19:00 Group 032
5.1 % Lambda (Idle) Self-Adaptation
20.3 % Lambda (Partial) Self-Adaptation


VCDS Fault codes

Code:
Thursday,30,July,2020,17:17:34:54968
VCDS Version: Release 20.4.1 (x64) Running on Windows 10 x64

Address 01: Engine Labels: 06A-906-032-BGP.lbl
Control Module Part Number: 07K 906 032 T HW: 07K 906 032 Q
Component and/or Version: 2.5l R5/4V G 9653
Software Coding: 0000001
Work Shop Code: WSC 00066 000 00000
VCID: 3A2D34467052F25B5DF-806E
6 Faults Found:

000369 - Fuel Trim; Bank 1
P0171 - 001 - System Too Lean - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 316959 km
Time Indication: 0
Date: 2000.00.00
Time: 00:43:21

Freeze Frame:
RPM: 2694 /min
Load: 38.0 %
Speed: 100.0 km/h
Temperature: 99.0°C
Temperature: 45.0°C
Absolute Pres.: 980.0 mbar
Voltage: 14.224 V

001290 - Cold Start Idle Air Control System
P050A - 002 - Malfunction - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 18
Reset counter: 255
Mileage: 317096 km
Time Indication: 0
Date: 2000.00.00
Time: 11:44:52

Freeze Frame:
RPM: 1263 /min
Load: 74.9 %
Speed: 0.0 km/h
Temperature: 30.0°C
Temperature: 28.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.970 V

000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 008 - - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10101000
Fault Priority: 0
Fault Frequency: 4
Reset counter: 255
Mileage: 317733 km
Time Indication: 0
Date: 2000.00.00
Time: 23:21:19

Freeze Frame:
RPM: 1426 /min
Load: 76.4 %
Speed: 0.0 km/h
Temperature: 20.0°C
Temperature: 32.0°C
Absolute Pres.: 980.0 mbar
Voltage: 14.097 V

000770 - Cylinder 2
P0302 - 008 - Misfire Detected - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10101000
Fault Priority: 0
Fault Frequency: 3
Reset counter: 255
Mileage: 317733 km
Time Indication: 0
Date: 2000.00.00
Time: 23:21:58

Freeze Frame:
RPM: 1207 /min
Load: 24.7 %
Speed: 9.0 km/h
Temperature: 29.0°C
Temperature: 33.0°C
Absolute Pres.: 980.0 mbar
Voltage: 14.351 V

000769 - Cylinder 1
P0301 - 008 - Misfire Detected - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10101000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 317881 km
Time Indication: 0
Date: 2000.00.00
Time: 19:51:49

Freeze Frame:
RPM: 2334 /min
Load: 69.0 %
Speed: 19.0 km/h
Temperature: 22.0°C
Temperature: 18.0°C
Absolute Pres.: 980.0 mbar
Voltage: 14.478 V

000771 - Cylinder 3
P0303 - 008 - Misfire Detected - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10101000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 317881 km
Time Indication: 0
Date: 2000.00.00
Time: 19:51:49

Freeze Frame:
RPM: 2334 /min
Load: 69.0 %
Speed: 19.0 km/h
Temperature: 22.0°C
Temperature: 18.0°C
Absolute Pres.: 980.0 mbar
Voltage: 14.478 V

Readiness: 0000 1001
 
   #3  

fin reaper

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Thanks Uwe. We suspected an air leak too, and built a diy smoke machine to test. Found one split hose and fixed it, cleared the fault codes and the lean code came back. I'll research that article you posted.
 
   #4  

Jack@European_Parts

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Fuel filter and fuel pump or regulation can simulate a lean condition can't they, what about N80 Evap, LDP or an FOD unapproved modified booster circuit?
 
   #5  

fin reaper

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The N80 evap solenoid was faulty and replaced with new. What is the LDP or an unapproved FOD mod?

Everything is stock on this vehicle, as far as I know.
 
   #6  

DV52

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^^^^^fin reaper: for LDP and FOD (Jack's most favorite acronym) - hover your mouse/pointing-device over the letters and the forum lexicon should display their meaning

Don
 
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Jack@European_Parts

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   #8  

fin reaper

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Got it - when viewing from my phone, I didn't have the ability to hover over the lexicons. I see it now with my PC. Where did you see the SAI and CAT weren't ready? I looked again at my first posted engine scan and didn't see that.


Here is the full scan.

Code:
Sunday,02,August,2020,11:31:09:54968
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 20.4.2.0 (x64)  HEX-V2 CB: 0.4513.4
Data version: 20200730 DS317.0
www.Ross-Tech.com


VIN: 3VWEF71K07M169825   License Plate: 


Chassis Type: 1K (1K0)
Scan: 01 03 08 09 15 16 17 19 25 42 44 46 52 56 62 72

VIN: 3VWEF71K07M169825   Mileage: 318880km-198142miles

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: Malfunction 0010
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: Malfunction 1010
72-Door, Rear Right -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 06A-906-032-BGP.lbl
   Part No SW: 07K 906 032 T    HW: 07K 906 032 Q
   Component: 2.5l R5/4V      G   9653  
   Revision: --H01---    Serial number: VWZ7Z0G9062102
   Coding: 0000001
   Shop #: WSC 00066 000 00000
   VCID: 3A2D34467052F25B5C7-806E

2 Faults Found:
000369 - Fuel Trim; Bank 1 
               P0171 - 001 - System Too Lean - MIL ON
             Freeze Frame:
                    Fault Status: 11100001
                    Fault Priority: 0
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 318793 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 01:19:12

             Freeze Frame:
                    RPM: 2708 /min
                    Load: 42.7 %
                    Speed: 101.0 km/h
                    Temperature: 96.0°C
                    Temperature: 46.0°C
                    Absolute Pres.: 990.0 mbar
                    Voltage: 14.224 V

000262 - Manifold / Barometric Pressure Sensor (G71) / (F96) 
               P0106 - 004 - Implausible Signal - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 0
                    Fault Frequency: 3
                    Reset counter: 255
                    Mileage: 318805 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 03:42:19

             Freeze Frame:
                    RPM: 448 /min
                    Load: 50.2 %
                    Speed: 0.0 km/h
                    Temperature: 87.0°C
                    Temperature: 54.0°C
                    Absolute Pres.: 990.0 mbar
                    Voltage: 11.811 V

Readiness: 0000 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1K0-907-379-MK60-F.lbl
   Part No SW: 1K0 907 379 AC    HW: 1K0 907 379 AC
   Component: ESP FRONT MK60      0101  
   Revision: 00H11001    
   Coding: 0021122
   Shop #: WSC 00066 000 00000
   VCID: 73B3D96217B843135F1-8026

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 1K0-820-047.lbl
   Part No: 1K0 820 047 GS
   Component: Climatic PQ35   120 0606  
   Shop #: WSC 00000 000 00000
   VCID: 7BA3F1423FE80B53071-802E

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 3C0-937-049-23-M.lbl
   Part No SW: 3C0 937 049 AD    HW: 3C0 937 049 AD
   Component: Bordnetz-SG     H52 2002  
   Revision: 00H52000    Serial number: 00000000621723
   Coding: 04058E234004150007140000001400000008730B5C0000
   Shop #: WSC 12345 123 12345
   VCID: 6B83C1024F889BD3971-803E

   Subsystem 1 - Part No: 1K1 955 119 C  Labels: 1KX-955-119.CLB
   Component: Wischer VW350  013  0402  
   Coding: 00063445
   Shop #: WSC 12345  

4 Faults Found:
00987 - Lamp for Brake Light; Left (M9) 
            012 - Electrical Fault in Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00101100
                    Fault Priority: 1
                    Fault Frequency: 3
                    Reset counter: 171
                    Mileage: 317038 km
                    Time Indication: 0
                    Date: 2005.09.13
                    Time: 31:63:63

             Freeze Frame:
                        ON
                    Voltage: 14.00 V
                        ON
                        ON
                        OFF
                        OFF
                        OFF

02394 - Parking Light Left Front (M1) 
            012 - Electrical Fault in Circuit
             Freeze Frame:
                    Fault Status: 01101100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 168
                    Mileage: 312810 km
                    Time Indication: 0
                    Date: 2005.09.13
                    Time: 31:63:63

             Freeze Frame:
                        ON
                    Voltage: 13.95 V
                        ON
                        ON
                        OFF
                        OFF
                        OFF

02395 - Parking Light Front Right (M3) 
            012 - Electrical Fault in Circuit
             Freeze Frame:
                    Fault Status: 01101100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 168
                    Mileage: 312810 km
                    Time Indication: 0
                    Date: 2005.09.13
                    Time: 31:63:63

             Freeze Frame:
                        ON
                    Voltage: 13.95 V
                        ON
                        ON
                        OFF
                        OFF
                        OFF

01333 - Door Control Module; Rear Left (J388) 
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 205
                    Mileage: 318783 km
                    Time Indication: 0
                    Date: 2005.09.13
                    Time: 31:63:63

             Freeze Frame:
                        OFF
                    Voltage: 12.40 V
                        OFF
                        ON
                        OFF
                        OFF
                        OFF


-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 1K0-909-605.lbl
   Part No SW: 1K0 909 605 AB    HW: 1K0 909 605 AB
   Component: 6A AIRBAG VW8R  034 8000  
   Revision: 05034000    Serial number: 003B6M01GX06  
   Coding: 0013889
   Shop #: WSC 00066 000 00000
   VCID: 6C81C21E4A869CEB9EB-8038

   Subsystem 1 - Part No: 1K0 959 339 F
   Component: BF-Gewichtsens. 007 0005

   Subsystem 2 - Serial number: 6332MSME1601485C8

   Subsystem 3 - Serial number: 6342MSME1718342CA

   Subsystem 4 - Serial number: 6351HSME0C77183AF

   Subsystem 5 - Serial number: 6361HSME0C7725438

   Subsystem 6 - Serial number: 63727SME0C284A7BE

   Subsystem 7 - Serial number: 63827SME0C285212-

1 Fault Found:
00532 - Supply Voltage B+ 
            002 - Lower Limit Exceeded - Intermittent

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 1K0-953-549-MY8.lbl
   Part No SW: 1K0 953 549 AP    HW: 1K0 953 549 AP
   Component: Lenksäulenmodul 036 0070  
   Coding: 0000021
   Shop #: WSC 00066 000 00000
   VCID: 005986AE560E688B523-8054

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1K0-920-xxx-17.lbl
   Part No SW: 1K0 920 953 P    HW: 1K0 920 953 P
   Component: KOMBIINSTRUMENT 3HL 1610  
   Revision: V0003000    Serial number: VWZ7Z0G9062102
   Coding: 0023207
   Shop #: WSC 25380 444 80674
   VCID: 38292E4E4E5EE04BAA3-806C

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 1K0-907-530-V2.clb
   Part No SW: 1K0 907 530 K    HW: 1K0 907 951 
   Component: J533__Gateway   H04 0021  
   Revision:   H04 02    Serial number: 240307F2000112
   Coding: 3D3F034007001002
   Shop #: WSC 00066 123 12345
   VCID: 2F3B1512BB1027F3FB9-807A

3 Faults Found:
01333 - Door Control Module; Rear Left (J388) 
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00110100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 205
                    Mileage: 318783 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 06:18:50

01305 - Databus for Infotainment 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 1
                    Fault Frequency: 254
                    Reset counter: 168
                    Mileage: 312782 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 22:43:44

01044 - Control Module Incorrectly Coded 
            000 - - - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 312810 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 00:11:03


-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No SW: 1K0 920 953 P    HW: 1K0 920 953 P
   Component: IMMO            3HL 1610  
   Revision: V0003000    Serial number: VWZ7Z0G9062102
   Shop #: WSC 00000 000 00000
   VCID: 38292E4E4E5EE04BAA3-806C

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels:. 1K0-959-701-MIN3.clb
   Part No SW: 1K0 959 701 P    HW: 1K0 959 793 L
   Component: J386  TUER-SG FT    1133  
   Revision: 32008001    Serial number: 00000506978327
   Coding: 0001205
   Shop #: WSC 00066 000 00000
   VCID: 3B2331427F68CB53471-806E

3 Faults Found:
01552 - Motor for Central Locking; Drivers Door (V56); Lock 
            012 - Electrical Fault in Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00101100
                    Fault Priority: 3
                    Fault Frequency: 105
                    Reset counter: 207
                    Mileage: 0 km
                    Time Indication: 0

00928 - Locking Module for Central Locking; Front Driver Side (F220) 
            008 - Implausible Signal - Intermittent
             Freeze Frame:
                    Fault Status: 00101000
                    Fault Priority: 3
                    Fault Frequency: 116
                    Reset counter: 207
                    Mileage: 314218 km
                    Time Indication: 0

00105 - Signal Central Locking SAVE/LOCK Drivers Side 
            008 - Implausible Signal - Intermittent
             Freeze Frame:
                    Fault Status: 00101000
                    Fault Priority: 3
                    Fault Frequency: 219
                    Reset counter: 187
                    Mileage: 313096 km
                    Time Indication: 0


-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1Kx-909-144-G2V3.clb
   Part No: 1K1 909 144 L
   Component: EPS_ZFLS Kl.069 H07 1806  
   Shop #: WSC 00066 000 00000
   VCID: 34311A7E5236042B86B-8060

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 1K0-959-433-MAX.clb
   Part No SW: 1K0 959 433 CT    HW: 1K0 959 433 CT
   Component:    KSG PQ35 RDK 052 0218  
   Revision: 00052000    Serial number: 00000000000000
   Coding: 13900F880186281B0904058FB0880F0488FCA0
   Shop #: WSC 00066 123 12345
   VCID: 04518ABE421674AB76B-8050

   Subsystem 1 - Component:   Sounder n.mounted     

   Subsystem 2 - Component:       NGS n.mounted     

   Subsystem 3 - Component:      IRUE n.mounted     

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
   Part No SW: 1K0 959 702 P    HW: 1K0 959 792 L
   Component: J387  TUER-SG BT    1133  
   Revision: 32008001    Serial number: 00000027678330
   Coding: 0001204
   Shop #: WSC 00066 000 00000
   VCID: 3C21325E7A66CC6B4EB-8068

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio
Cannot be reached

-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels:. 1K0-959-703-GEN3.clb
   Part No SW: 1K0 959 703 Q    HW: 1K0 959 795 J
   Component: J388   TUER-SG HL   1120  
   Revision: 12006001    Serial number: 00000001278976
   Coding: 0001168
   Shop #: WSC 00066 000 00000
   VCID: 3E2538566C7ADE7B60F-806A

2 Faults Found:
00930 - Locking Module for Central Locking; Rear Left (F222) 
            008 - Implausible Signal - Intermittent
             Freeze Frame:
                    Fault Status: 00101000
                    Fault Priority: 3
                    Fault Frequency: 2
                    Reset counter: 196
                    Mileage: 318552 km
                    Time Indication: 0

01554 - Motors for Central Locking; Rear Doors; Lock 
            012 - Electrical Fault in Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00101100
                    Fault Priority: 3
                    Fault Frequency: 2
                    Reset counter: 196
                    Mileage: 0 km
                    Time Indication: 0


-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels:. 1K0-959-704-GEN3.clb
   Part No SW: 1K0 959 704 Q    HW: 1K0 959 794 J
   Component: J389   TUER-SG HR   1120  
   Revision: 12006001    Serial number: 00000001302739
   Coding: 0001168
   Shop #: WSC 00066 000 00000
   VCID: 3FDB45526B70D7736B9-806A

No fault code found.

End----------(Elapsed Time: 01:15, VBatt start/end: 14.0V/13.9V)-----------
 
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   #10  

fin reaper

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We did the sanity MAF check. The installed sensor hit 73% of rated hp at 600 ft above sea level. Tried Original MAF and it hit 77% or rated hp. We'll keep the original in for now.

Also worth noting - we found that the engine died when oil cap was removed. First thought was PCV system prob. Disconnected PCV hose and plugged intake side, while venting valve cover side to atmosphere with a hose. Drove 10 miles and lean code triggered again.
 
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   #12  

fin reaper

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Which group would tell me that? I first looked at Groups 106, 140, 141, 230 and found blanks in the measuring blocks. I then searched all groups looking for fuel related data to no avail.
 
   #13  

Jack@European_Parts

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RTFB observed, Mechanical components being tested with PSI gauge, stop watch and volume accumulated in timeframe in measuring device?
 
   #14  

fin reaper

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The fine book is certainly next on the list. We were able to connect a fuel pressure gauge to the fuel rail (at schrader valve). ~24psi. Seemed to hold after shutting off engine for the most part, but did bleed off a few psi. We haven't tested flow rate yet.

Someone posted elsewhere that bentley says to measure the fp on the output of the fuel filter (spec 58 psi). That poster also showed their psi at the fuel rail also matched the jerry rigged fuel filter measurement.

Next step is to replace the fuel filter (with integral regulator) then the fuel pump.

I'll keep you posted. Thanks
 
   #15  

Jack@European_Parts

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Did you read the entire JPPSG thread yet and all page's?
 
   #16  

fin reaper

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I did, somewhat distracted by other goings on, but it sounds like I need to go back and review it again. :)
 
   #17  

fin reaper

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Replaced the regulator fuel filter as the next step, still no change in psi @ fuel rail. Installed a new Bosch fuel pump and psi jumped from 24 to almost 70 psi. MIL has cleared and it is now running very well. Thanks for your help.
 
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