2013 Audi Allroad B8 - intermittent hard start

[4lane]

The past two days I've had three intermittent occurrences of a hard start while all other starts were normal, on a B8 2013 Audi Allroad.

1) Press Ignition Button : car fires and immediately stalls
2) Press Ignition Button Second Time: car continually cranks for ~5s before starting, after which it seems to run normally

I ran a scan and received the following. I'm looking at fault 4106 - Bank 1; System too Rich at Idle, since it gives a date when it occurred, although this wasn't the date of the most recent occurrence for some reason. I was thinking the N80 valve might be faulty but wasn't sure if that could lead to an intermittent hard start I'm experiencing. Any help is appreciated.

--------------------------------------------------------------------------------
 Mileage: 98110km-60962miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: Malfunction 0010
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
72-Door, Rear Right -- Status: Malfunction 0010
-------------------------------------------------------------------------------
Address 01: Engine (DET-CPMA)       Labels:. 06H-907-115-CDN.clb
   Part No SW: 8K5 907 115 F    HW: 8K2 907 115 L
   Component: 2.0l R4/4V TF H09 0008  
   Revision: ECH09---    
   Coding: 722A0013242600062000
   Shop #: WSC 54964 001 1048576
   ASAM Dataset: EV_ECM20TFS0118K5907115F 001009
   ROD: EV_ECM20TFS0118K5907115F.rod
   VCID: 3537DC2F05C1E6B3B0D-8060

1 Fault Found:
4106 - Bank 1; System too Rich at Idle 
          P2188 00 [232] - -
          MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 3
                    Mileage: 97906 km
                    Date: 2020.05.28
                    Time: 16:34:15

                    Engine speed: 827.00 /min
                    Normed load value: 23.5 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 96 °C
                    Intake air temperature: 21 °C
                    Ambient air pressure: 970 mbar
                    Voltage terminal 30: 14.442 V
                    Unlearning counter according OBD: 40
                    Median injection timing: 1.585 ms
                    Engine operating condition: Idling
                    Engine operating condition-Test_Program_Channel 87: 5
                    Brake actuated status-Bits 0-7: 59
                    Engine torque: 60.3 Nm

Readiness: 0000 0100

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels:| 0BK-927-156.clb
   Part No SW: 8K1 927 158     HW: 0BK 927 156 AL
   Component: 0BK 20TFSIUSA H16 1006  
   Revision: --H16---    
   Coding: 000002
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_TCMAL551211 002022
   ROD: EV_TCMAL551211_002_AU48.rod
   VCID: 74B1212B4E3BBFBB473-8020

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 8K0-907-379-V1.clb
   Part No SW: 8K9 907 379 M    HW: 8K9 907 379 M
   Component: ESP8 quattro  H09 0100  
   Revision: --------    Serial number: --------------
   Coding: 0E1D18
   Shop #: WSC 06334 000 00000
   VCID: 4CC199CB76CB877BFF3-8018

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393)       Labels:. 8K0-907-064-05.clb
   Part No SW: 8K0 907 064 FP    HW: 8K0 907 064 FP
   Component: BCM2 2.0      H10 0602  
   Revision: 00002001    
   Coding: 0D820000000000000000
   Shop #: WSC 06335 000 00000
   VCID: 035372F71B1588034E9-8056

   Subsystem 1 - Part No SW: 8K0 905 852 E    HW: 8K0 905 852 E
   Component: J764 ELV MLB  H40 0046 
   Serial number: 2312000100185014    

1 Fault Found:
00955 - Key 1 
            002 - Lower Limit Exceeded
             Freeze Frame:
                    Fault Status: 01100010
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 78
                    Mileage: 97895 km
                    Time Indication: 0
                    Date: 2020.05.28
                    Time: 16:04:28


-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels: Redir Fail!
   Part No SW: 8K1 820 043 N    HW: 8K1 820 043 N
   Component: KLIMA 3 ZONEN H04 0123  
   Revision: C1000000    Serial number: 01110520121266
   Coding: 6480208000
   Shop #: WSC 06335 000 00000
   VCID: 3333E2370B35F8839E9-8066

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8K0-907-063.clb
   Part No SW: 8K0 907 063 DH    HW: 8K0 907 063 AH
   Component: BCM1 1.0      H14 0103  
   Revision: 08014001    Serial number: 00000030437701
   Coding: 26000091803CAFC00000480300003D0D0F1C4708A2090221000008000000030100000030000000
   Shop #: WSC 08185 444 103375
   VCID: 78A9151B52D3DBDB6BB-802C

   Subsystem 1 - Part No SW: 8K1 955 119 A    HW: 8T1 955 119   Labels: 1KX-955-119.CLB
   Component: WWS 110512  H07 0070 
   Serial number: SWF12050115803      
   Coding: 00FD11

   Subsystem 2 - Part No SW: 8U0 955 559 B    HW: 8U0 955 559 B  Labels: 8U0-955-559.CLB
   Component: G397_RLFS  H06 0002 
   Serial number: 20271225            
   Coding: 02005D

   Subsystem 3 - Part No SW: 8K0 941 531 AS    HW: 8K0 941 531 AS
   Component: E1 - LDS  H03 0031 
   Serial number: 00000000000305120151

   Subsystem 4 - Part No SW: 4G0 907 410 A    HW: 4H0 907 410 A
   Component: USHL4.2  H30 0030 
   Serial number: 0000002274555R1NZ702

   Subsystem 5 - Part No SW: 4H0 907 658     HW: 4H0 907 658 
   Component: AQ_Hum_Sensor  H02 0002 
   Serial number: 2908C126000000000001

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 8K0-959-655.clb
   Part No SW: 8K0 959 655 M    HW: 8K0 959 655 M
   Component: AirbagVW-AU10 H46 0610  
   Serial number: 003KEDA014G   
   Coding: 303844354A32303030304A55304C384B3053
   Shop #: WSC 00040 002 1048576
   ASAM Dataset: EV_AirbaECUVWAUDI010 003010
   ROD: EV_AirbaECUVWAUDI010_003_AU48.rod
   VCID: 47CBA6E76F2D6423D21-8012

   Seat occupied recognition: 
   Subsystem 1 - Part No SW: 8K0 959 339 C    HW: 8K0 959 339 C
   Component: BF-Gewichtss.  H02 0040 
   Serial number: 5810000R1200008MMA

   Crash sensor for side airbag: driver side: 
   Serial number: 6334MSME6E514072C

   Crash sensor for side airbag: front passenger side: 
   Serial number: 6344MSME6F222D3BS

   Crash sensor for side airbag: rear: driver side: 
   Serial number: 6352QSME441653628

   Crash sensor for side airbag: rear: passenger side: 
   Serial number: 6362QSME4F15014CK

   Crash sensor for front airbag: driver side: 
   Serial number: 63732SME6D14325A0

   Crash sensor for front airbag: front passenger side: 
   Serial number: 63832SME4C145162Z

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels:. 8K0-953-568.clb
   Part No SW: 8R0 953 568 Q    HW: 8R0 953 568 Q
   Component: Lenks.Modul   H02 0171  
   Revision: 00000000    Serial number: 20120514001084
   Coding: 000017
   Shop #: WSC 06335 000 00000
   VCID: 4FFB8EC787DDBC639A1-801A

   Component: E221 - MFL  H03 0003 

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:. 8T0-920-xxx-17.clb
   Part No SW: 8K0 920 982 A    HW: 8K0 920 982 A
   Component: KOMBIINSTR.   H35 0540  
   Revision: 00000000    Serial number: NTC23475D     
   Coding: 8B3629020301D705020000
   Shop #: WSC 06335 000 00000
   VCID: 323DE733F42FF18B95F-8066

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 8T0-907-468.clb
   Part No SW: 8R0 907 468 C    HW: 8R0 907 468 C
   Component: GW-BEM 4CAN-M H10 0025  
   Revision: 1Y030014    Serial number: 1441Y125030368
   Coding: 00C303FF00
   Shop #: WSC 06335 000 00000
   VCID: 3FDBBE07377D2CE36A1-806A

   Subsystem 1 - Part No SW: 8T0 915 181     HW: 8T0 915 181 
   Component: J367-BDMHella  H03 8041 
   Serial number: 8175957401          

No fault code found.

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr (J136)       Labels:. 8T0-959-760.clb
   Part No SW: 8K0 959 760 D    HW: 8K0 959 760 D
   Component: MEM-FS        H06 0076  
   Revision: AA000000    Serial number: 00000029145580
   Coding: 00581B00000000000000
   Shop #: WSC 06335 000 00000
   VCID: 3B23CA17236530C3469-806E

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:. 8K0-959-793.clb
   Part No SW: 8K0 959 793 P    HW: 8K0 959 793 P
   Component: TSG FA        H02 0506  
   Revision:             Serial number: 0000029908343 
   Coding: 011C13205E00410001
   Shop #: WSC 06335 000 00000
   VCID: 4DC794CF8DD18E73E8D-8018

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist (J500)       Labels:| 8K0-909-144.clb
   Part No SW: 8K0 909 144 F    HW: 8K0 909 144 B
   Component: RCEPS         H36 0507  
   Revision: 00001000    Serial number: 0020526803
   Coding: 100000000001
   Shop #: WSC 08185 444 122181
   ASAM Dataset: EV_RCEPSAU48X 008014
   ROD: EV_RCEPSAU48X_008.rod
   VCID: 3431E12B0EBBFFBB873-8060

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. (J393)       Labels:. 8K0-907-064-46.clb
   Part No SW: 8K0 907 064 FP    HW: 8K0 907 064 FP
   Component: BCM2 2.0      H10 0602  
   Revision: 00002001    Serial number: 0176517259    
   Coding: 0126023A20BA709580B0023200000000
   Shop #: WSC 06334 000 00000
   VCID: 035372F71B1588034E9-8056

   Subsystem 1 - Part No SW: 8K0 959 719 B    HW: 8K0 959 719 
   Component: GTO BF  H01 0080 
   Serial number: 00000000000000519778

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 

   Subsystem 3 - Part No SW: 8K0 959 591 B    HW: 8K0 959 591 
   Component: J245 PS150  H08 0043 

   Subsystem 4 - Part No SW: 8K0 959 591 B    HW: 8K0 959 591 
   Component: J394 PS240  H08 0043 

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System (J525)       Labels:. 8T0-035-223-BOM.clb
   Part No SW: 8T1 035 223 A    HW: 8T1 035 223 A
   Component: DSP Prem      H04 0030  
   Revision: 00004001    Serial number: 94814003201301
   VCID: 2D07F44FED11AE73C8D-8078

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:. 8K0-959-792.clb
   Part No SW: 8K0 959 792 P    HW: 8K0 959 792 P
   Component: TSG BF        H02 0506  
   Revision:             Serial number: 0000029772602 
   Coding: 011C13205E00410001
   Shop #: WSC 06335 000 00000
   VCID: 4CC199CB76CB877BFF3-8018

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (----)       Labels: 8K0-907-801-V2.clb
   Part No SW: 8K0 907 801 L    HW: 8K0 907 801 J
   Component: EPB-4         H01 0003  
   Revision: --------    Serial number: 00000000048809
   ASAM Dataset: EV_ParkiBrake 001027
   ROD: EV_ParkiBrake_AU48.rod
   VCID: 3829D51B12D31BDBABB-806C

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (R)       Labels: Redir Fail!
   Part No SW: 4G0 035 080 G    HW: 4G0 035 080 
   Component: Radio U SIRIU H60 0133  
   Revision: AB001007    Serial number: 158H10E7505942
   Coding: 020007010000000001
   Shop #: WSC 01238 002 1048576
   VCID: 221D1773A4CF610B65F-8076

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794)       Labels:. 4E0-035-6xx-5F.clb
   Part No SW: 8R1 035 746 G    HW: 8R1 035 746 A
   Component: H-BNT-NA      H42 0901  
   Revision: --------    Serial number: 096E 0C7510836
   Coding: 010200050006A1EF41028F4E00000403140000000000000000
   Shop #: WSC 06335 000 00000
   VCID: 3B23CA17236530C3469-806E

   Subsystem 1 - Part No: 8R0 060 884 AD
   Component: NAR 2011  0505 

   Subsystem 2 - Part No SW: 8R0 919 604     HW: 8R0 919 604 
   Component: DU7 High  H41 0104 
   Serial number: A130EG0CS169387     

   Subsystem 3 - Part No SW: 8T0 919 611 L    HW: 8T0 919 611 C
   Component: E0380 Bedient  H02 0030 
   Serial number: 00000001153298      

   Subsystem 4 - Part No: 8R0 060 961 B
   Component: CD-Database  3371 

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels:. 8K0-959-795.clb
   Part No SW: 8K0 959 795 D    HW: 8K0 959 795 D
   Component: TSG HL        H01 0506  
   Revision:             Serial number: 0000030049731 
   Coding: 010C13204000210001
   Shop #: WSC 06335 000 00000
   VCID: 43D3B2F75B9548030E9-8016

No fault code found.

-------------------------------------------------------------------------------
Address 6C: Back-up Cam.        Labels: 8T0-907-441.clb
   Part No SW: 8T0 907 441 D    HW: 8T0 907 441 D
   Component: J772__Rearview      0140  
   Revision: --H06---    Serial number: 525PA8-J229325
   Coding: 1000007
   Shop #: WSC 06335 000 00000
   VCID: 392FD01F255902D3545-806C

No fault code found.

-------------------------------------------------------------------------------
Address 6D: Trunk Elect. (J605)       Labels: 8K9-827-851.clb
   Part No SW: 8K9 827 851 A    HW: 8K9 827 851 A
   Component: J605  Master  H52 0330  
   Revision: --------    Serial number: 8K9827851A    
   VCID: 3C21C90B266B37FB4F3-8068

   Subsystem 1 - Part No SW: 8K9 827 852 A    HW: 8K9 827 852 A
   Component: J756  Slave  H52 0330 
   Serial number: 8K9827852A          

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels:. 8K0-959-795.clb
   Part No SW: 8K0 959 795 D    HW: 8K0 959 795 D
   Component: TSG HR        H01 0506  
   Revision:             Serial number: 0000030050712 
   Coding: 010C13204000210001
   Shop #: WSC 06335 000 00000
   VCID: 43D3B2F75B9548030E9-8016

1 Fault Found:
02115 - Locking Unit for Central Locking 
            008 - Implausible Signal - Intermittent
             Freeze Frame:
                    Fault Status: 00101000
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 132
                    Mileage: 98050 km
                    Time Indication: 0
                    Date: 2020.06.04
                    Time: 18:52:02


End----(Elapsed Time: 02:02, VBatt start/end: 11.8V/11.8V. VIgn 11.7V)-----

[4lane]

Any thoughts on best place to start based on the fact that the issue is intermittent, it's related to starting only, and the car never stutters/hesitates otherwise? I was originally thinking HPFP or sticking injector but the fact that it happens randomly and only at start-up perplexes me a bit and maybe it's more of an occasional air leak when starting?

[xander3zero]

Any thoughts on best place to start based on the fact that the issue is intermittent, it's related to starting only, and the car never stutters/hesitates otherwise? I was originally thinking HPFP or sticking injector but the fact that it happens randomly and only at start-up perplexes me a bit and maybe it's more of an occasional air leak when starting?

I am experiencing the exact same issue I believe. Seems like it only happens when my engine is already warm, like if I've just driven the car, and start it up again 10-20 minutes later. Very intermittent, maybe 2-3 times in the past 2 months or so from when it first happened.

I've had the entire timing chain/tensioner job done at the dealership in the last year, so I doubt it timing chain stretch. From another thread some ppl mentioned the possibility of it being a clogged fuel filter - starving the engine on the start because the fuel pump wasn't primed when you opened the door (cause the car was recently driven).

[4lane]

I am experiencing the exact same issue I believe. Seems like it only happens when my engine is already warm, like if I've just driven the car, and start it up again 10-20 minutes later. Very intermittent, maybe 2-3 times in the past 2 months or so from when it first happened.

I've had the entire timing chain/tensioner job done at the dealership in the last year, so I doubt it timing chain stretch. From another thread some ppl mentioned the possibility of it being a clogged fuel filter - starving the engine on the start because the fuel pump wasn't primed when you opened the door (cause the car was recently driven).

I have experienced it on a cold engine at one time I can remember so I can't say it's totally related to a warm engine. My biggest clue is when it started after mashing the throttle to the floor. I'm thinking it's more of an N80 valve issue. Fuel vapors collect, and when starting, the engine draws in fuel-rich air plus more fuel from injectors which creates a rich issue leading to a hard start. When I put the throttle to the floor when cranking, it allowed fresh air in the intake, leaning it back out and allowing the start. Maybe the N80 randomly goes haywire once in a while? The only problem with the theory is that I've never had an issue after refueling and it's such an infrequent occurrance.

Are you getting a P2188 error? Do you smell fuel in your oil?

[xander3zero]

I have experienced it on a cold engine at one time I can remember so I can't say it's totally related to a warm engine. My biggest clue is when it started after mashing the throttle to the floor. I'm thinking it's more of an N80 valve issue. Fuel vapors collect, and when starting, the engine draws in fuel-rich air plus more fuel from injectors which creates a rich issue leading to a hard start. When I put the throttle to the floor when cranking, it allowed fresh air in the intake, leaning it back out and allowing the start. Maybe the N80 randomly goes haywire once in a while? The only problem with the theory is that I've never had an issue after refueling and it's such an infrequent occurrance.

Are you getting a P2188 error? Do you smell fuel in your oil?

I have not scanned it yet, and have not gotten a CEL from it.

Next time I remember I'll pop the oil cap and give it a sniff.

It's been so intermittent that I haven't been thinking about it much. I used to try and chase down every little thing with my last Audi and it led to a lot of headaches - I've become less concerned with some age I guess lol. Especially since my car is nearing 100k.

Sent from my Pixel 2 using Tapatalk

[4lane]

I have not scanned it yet, and have not gotten a CEL from it.

Next time I remember I'll pop the oil cap and give it a sniff.

It's been so intermittent that I haven't been thinking about it much. I used to try and chase down every little thing with my last Audi and it led to a lot of headaches - I've become less concerned with some age I guess lol. Especially since my car is nearing 100k.

Sent from my Pixel 2 using Tapatalk

I hear you there; I had the same approach until I smelled gas in the oil. That made me want to take action for obvious reasons. I was hoping to get more direction based on the symptoms on this thread before I start throwing money at the problem. Here are my options and my thoughts if anyone wants to weigh in.

N80: I'm putting my chips here at this point per my explanation above. The only odd part is that it's such an intermittent issue.
HPFP: Possible, but when it starts by putting the throttle to the floor the HPFP wouldn't have any change, nor would successful starts when the pedal is to the floor. Plus, I never have any stalling, hesitating, etc. Also, engine oil level has not gone up meaning it's not leaking significant gas into the oil, so I'm not thinking this is the source.
Stuck injector: Possible, but the issue is only with starts, not with any other engine issues. Also, engine oil level has not gone up meaning an injector is leaking consistently in the oil, so I'm not thinking the source.
PCV: Possible, but I believe PCV issues lead to more lean issues rather than rich issues. But I don't know much more about this.

[AndreX86]

I am experiencing the exact same issue I believe. Seems like it only happens when my engine is already warm, like if I've just driven the car, and start it up again 10-20 minutes later. Very intermittent, maybe 2-3 times in the past 2 months or so from when it first happened.

I've had the entire timing chain/tensioner job done at the dealership in the last year, so I doubt it timing chain stretch. From another thread some ppl mentioned the possibility of it being a clogged fuel filter - starving the engine on the start because the fuel pump wasn't primed when you opened the door (cause the car was recently driven).

Did you ever fix this issue? I bought a used 2013 allroad a few months ago (may late June?) w/74,000 miles and this has been happening to me off and on when the car is warm. I can start it right back up from a stop but leave it for a bit and come back and sometimes it will struggle. Replaced ignition coils and spark plugs as I was getting a code for bank 1 being to rich and that plus changing the air filter line to the high pressure fuel pump and the issue is not nearly as frequent and when it does happen it can actually push through the issue and start the engine some of the time but the issue still exists.

I've read that it could be the High Pressure Fuel Pump, Coolant temp sensor or Crank position sensor. Thinking about replacing the crank position sensor since its so cheap and see what happens.

[xander3zero]

Did you ever fix this issue? I bought a used 2013 allroad a few months ago (may late June?) w/74,000 miles and this has been happening to me off and on when the car is warm. I can start it right back up from a stop but leave it for a bit and come back and sometimes it will struggle. Replaced ignition coils and spark plugs as I was getting a code for bank 1 being to rich and that plus changing the air filter line to the high pressure fuel pump and the issue is not nearly as frequent and when it does happen it can actually push through the issue and start the engine some of the time but the issue still exists.

I've read that it could be the High Pressure Fuel Pump, Coolant temp sensor or Crank position sensor. Thinking about replacing the crank position sensor since its so cheap and see what happens.

Sorry just saw this, potentially it's your timing chain "lengthening" due to age.

During warm starts the chain is warm and has lengthened even further, this throws off the crank angle and can cause a lot of issues.

My dealership was able to confirm that my timing chain had "failed" by doing a diagnostic via vagcom that reads the crank position angle, they replaced the timing chain and tensioners. About 60% of the job was covered by an extended warranty I have.

Sent from my Pixel 2 using Audizine Forum mobile app

[AndreX86]

Sorry just saw this, potentially it's your timing chain "lengthening" due to age.

During warm starts the chain is warm and has lengthened even further, this throws off the crank angle and can cause a lot of issues.

My dealership was able to confirm that my timing chain had "failed" by doing a diagnostic via vagcom that reads the crank position angle, they replaced the timing chain and tensioners. About 60% of the job was covered by an extended warranty I have.

Sent from my Pixel 2 using Audizine Forum mobile app

No worries. I'm thinking this could be the timing chain lengthening and I was going to get a VCDS to obtain info on the crank position angle. I just installed a new crank position sensor so we'll see if there's a difference. Though now since the temps have cool I'm not encountering the issue as of late.

Could you possibly share the bill for the timing chain replacement?

[xander3zero]

Dealership cost was around $1800, I had an aftermarket warranty that covered about 60% of it so I only paid about 800 out of pocket thankfully.

Sent from my Pixel 2 using Audizine Forum mobile app

[AndreX86]

Dealership cost was around $1800, I had an aftermarket warranty that covered about 60% of it so I only paid about 800 out of pocket thankfully.

Sent from my Pixel 2 using Audizine Forum mobile app

Thanks for the info :). I'll see if I can't get the Allroad into a shop and find out what that crank position angle is. Wish me luck.

[AndreX86]

So I believe I fixed my issue. The main difference between our issues was your Allroad was immediately stalling where mine would keep cranking and not start unless you gave it gas. It also would idle a little weird for a bit after this occurred. I also noticed my 0-60 seemed slow. I changed the crank shaft position sensor but the issue returned. I just changed the camshaft position sensor and immediately noticed a difference when the engine started, immediate and quite noticeable improvement in MPG, noticeable improvement in performance and engine sound and my 0-60 time was nocked off by a full second so I believe in my case it was the camshaft position sensor.

[alpo996]

So I believe I fixed my issue. The main difference between our issues was your Allroad was immediately stalling where mine would keep cranking and not start unless you gave it gas. It also would idle a little weird for a bit after this occurred. I also noticed my 0-60 seemed slow. I changed the crank shaft position sensor but the issue returned. I just changed the camshaft position sensor and immediately noticed a difference when the engine started, immediate and quite noticeable improvement in MPG, noticeable improvement in performance and engine sound and my 0-60 time was nocked off by a full second so I believe in my case it was the camshaft position sensor.

Andre, did your no-start issue go away then? Thanks.

[AndreX86]

Andre, did your no-start issue go away then? Thanks.

It did not. No start when warm after sitting idle is still an issue, just not that much due to the colder weather. I'm thinking its the vapor purge solenoid. I bought a replacement vapor purge solenoid but it was the wrong fit so I'm waiting to get my money back and purchase the correct one for my car.

[4lane]

The HPFP is very plausible. I replaced the N80 and cleaned the MAF w/ no success. Then I noticed oil level dropping and replaced the PCV valve and have not had the issue since.

[AndreX86]

The HPFP is very plausible. I replaced the N80 and cleaned the MAF w/ no success. Then I noticed oil level dropping and replaced the PCV valve and have not had the issue since.

I'm pretty sure you just fixed my issue and I haven't even done anything yet. Looking up the PCV valve, the errors I've had and the loss of oil I've seemingly had recently I'm sure this is the fix. Will replace and update. On another note I have been using E85 only and the issue did not exist but this is likely having to do with how much more gas is needed for E85.

[AndreX86]

I'm pretty sure you just fixed my issue and I haven't even done anything yet. Looking up the PCV valve, the errors I've had and the loss of oil I've seemingly had recently I'm sure this is the fix. Will replace and update. On another note I have been using E85 only and the issue did not exist but this is likely having to do with how much more gas is needed for E85.

Unfortunately the startup issue came back a little while after replacing PCV Valve. But what is weird is it came back while it was cooler outside and now thats it has warmed up and after replacing all the E85 with 91 the car hasn't stalled since but it is hesitating just a bit on startup sometimes and I can't tell if it's normal or not. So I need to play the waiting game some more and see what happens.

I believe replacing the PCV valve resolved oil consumption issues. After replacing the oil I haven't noticed it going down at all and before it seemed to consume it fairly quick. It may have also helped with the initial starting issue in some way but I can't be sure.*

One thing to note is I bought the car used and found out that the original car battery is still inside... So it's 8 years old at this point, straight from the factory. so I need to get this replaced asap just to eliminate any possibility of it being a dying battery. If it doesn't have issues for the next month or so then it likely was the PCV valve and those start up issues where ghosts??*

[alpo996]

Unfortunately the startup issue came back a little while after replacing PCV Valve. But what is weird is it came back while it was cooler outside and now thats it has warmed up and after replacing all the E85 with 91 the car hasn't stalled since but it is hesitating just a bit on startup sometimes and I can't tell if it's normal or not. So I need to play the waiting game some more and see what happens.

I believe replacing the PCV valve resolved oil consumption issues. After replacing the oil I haven't noticed it going down at all and before it seemed to consume it fairly quick. It may have also helped with the initial starting issue in some way but I can't be sure.*

One thing to note is I bought the car used and found out that the original car battery is still inside... So it's 8 years old at this point, straight from the factory. so I need to get this replaced asap just to eliminate any possibility of it being a dying battery. If it doesn't have issues for the next month or so then it likely was the PCV valve and those start up issues where ghosts??*

I hope that fixed your starting issue. Mine is getting worse. Just got VCDS and will take a scan tonight, hoping to see something.

[AndreX86]

Replaced the high pressure fuel pump and the issue is resolved. Not even a hint of hesitation after driving around for days in extreme heat.

I had also replaced the battery which didn't fix the issue.

[Zuzuwu]

My car was doing this but very very intermittently. The high pressure pump is definitely the culprit, that’s what fixed mine as well.


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[S-Liner]

+1 on the HPFP

Intermittent is definitely in the realm of HPFP issues


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