Caddy 1.9 tdi intermittent non start

[LED Sandwich]

I
have a 2010 1.9tdi that has started stalling during startup. It was quite intermittent but has become more common. Most of the time it starts well and fires up.

Other times it will try to fire and stall and after this it can be hard to start. I have scanned with vcds with no fault codes and checked the torsion value, crank and cam sensors all seem in spec when running.

I am at a loss as to what it could be so thought I’d ask the wisdom of this form.

I have recently changed the injector seals as I did previously have a long crank issue when left for a few days but that’s been fine for about a year now.

Could this be a sticking egr, or would u get a code?

Thanks
Aaron

 

[Uwe]

I have scanned with vcds with no fault codes

Please post an Auto-Scan for context anyway.

-Uwe-

 

[LED Sandwich]

Hi Uwe, thnaks very much for the reply please see the scan below.

Wednesday,04,December,2024,13:23:18:41814
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x86
VCDS Version: 24.7.1.0  HEX-V2 CB: 0.4643.4
Data version: 20240919 DS356.3
www.Ross-Tech.com


VIN: WV1ZZZ2KZ9X086185   License Plate: OU10EXO
Mileage: 240750km-149595mi   Repair Order: non start



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 2K (1K0)
Scan: 01 03 09 15 16 17 19 25 42 46 52 56

VIN: WV1ZZZ2KZ9X086185   Mileage: 240750km-149595miles

01-Engine -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 03G-906-021-BLS.clb
   Part No SW: 03G 906 021 PD    HW: 03G 906 021 CG
   Component: R4 1,9L EDC G000SG  2387 
   Revision: --H09---    Serial number: VWX7Z0HN3NK01R
   Coding: 0000031
   Shop #: WSC 35110 377 00157
   VCID: 70B9DC03D6A926EAAFB-8024
   VINID: 9E606AAAA09BA89A0020604814C1A8787E

No fault code found.
Readiness: 0 0 0 0 0

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels:. 1K0-907-379-MK70M.clb
   Part No SW: 1K0 907 379 AF    HW: 1K0 907 379 AF
   Component: MABS MK70M          0104 
   Revision: 00H32001   
   Coding: 0020801
   Shop #: WSC 35110 377 00157
   VCID: 76B5EA1BB4CD08DA757-8022

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 3C0-937-049-30-M.lbl
   Part No SW: 3C8 937 049 D    HW: 3C8 937 049 D
   Component: Bordnetz-SG     H54 2602 
   Revision: 00H54000    Serial number: 01000009063054
   Coding: 00884F030004100057000000000000000009FB075C000120000000000000
   Shop #: WSC 35110 377 08192
   VCID: 323D160B182554FA99F-8066

   Subsystem 1 - Part No: 2K2 955 119 C  Labels: 1KX-955-119.CLB
   Component: Wischer 281008 021  0501 
   Coding: 00038805
   Shop #: WSC 35110 

2 Faults Found:
00834 - Signal for Activation of Heated Rear Window
            009 - Open or Short to Ground
             Freeze Frame:
                    Fault Status: 01101001
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 28
                    Mileage: 233426 km
                    Time Indication: 0

             Freeze Frame:
                        ON
                    Voltage: 13.85 V
                        ON
                        ON
                        OFF
                        OFF
                        OFF

00975 - Heated Rear Window (Z1)
            012 - Electrical Fault in Circuit
             Freeze Frame:
                    Fault Status: 01111100
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 28
                    Mileage: 233461 km
                    Time Indication: 0

             Freeze Frame:
                        ON
                    Voltage: 14.25 V
                        ON
                        ON
                        OFF
                        OFF
                        OFF


-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6Q0-909-605-VW52.lbl
   Part No SW: 6Q0 909 605 AH    HW: 6Q0 909 605 AH
   Component: 2Q AIRBAG VW52  025 2400 
   Revision: 06025000    Serial number: 0037TR03520X 
   Coding: 0012881
   Shop #: WSC 35110 377 00157
   VCID: 7DA7F53791FB5B8234D-8028

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 1K0-953-549-MY8.lbl
   Part No SW: 1K0 953 549 BC    HW: 1K0 953 549 BC
   Component: Lenksäulenmodul 636 0070 
   Coding: 0000022
   Shop #: WSC 01324 785 00200
   VCID: 74B1D013A2B11ACA4B3-8020

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1K0-920-xxx-17.lbl
   Part No SW: 2K0 920 944 CX    HW: 2K0 920 944 CX
   Component: KOMBIINSTRUMENT VDD 1222 
   Revision: V0002000    Serial number: VWX7Z0HN3NK01R
   Coding: 0000403
   Shop #: WSC 48357 067 57207
   VCID: 045180D3F2112A4A7B3-8050

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 1K0-907-530-V4.clb
   Part No SW: 1K0 907 530 S    HW: 1K0 907 951
   Component: J533  Gateway   H07 0071 
   Revision:   H07 01    Serial number: 211108F1001614
   Coding: 89801F02000202007401
   Shop #: WSC 35110 377 00157
   VCID: 372B271FF347B1D2AE1-8062

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No SW: 2K0 920 944 CX    HW: 2K0 920 944 CX
   Component: IMMO            VDD 1222 
   Revision: V0002000    Serial number: VWX7Z0HN3NK01R
   Shop #: WSC 00137 211 56823
   VCID: 045180D3F2112A4A7B3-8050

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels:. 1K0-959-701-MIN3.clb
   Part No SW: 1T0 959 701 M    HW: 1T0 959 701 M
   Component: Tuer-SG         008 2006 
   Coding: 0000560
   Shop #: WSC 35110 377 08192
   VCID: 41DF49C7AD83FF62105-8014

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 1K0-959-433-MIN.clb
   Part No: 1K0 959 433 CP
   Component:    KSG              0401 
   Coding: 808A0C087F2D8405485A030010C0
   Shop #: WSC 08224 211 56823
   VCID: 00598CC3E609366A5FB-8054

   Subsystem 1 - Component:   Sounder n.mounted    

   Subsystem 2 - Component:       NGS n.mounted    

   Subsystem 3 - Component:      IRUE n.mounted    

1 Fault Found:
00930 - Locking Module for Central Locking; Rear Left (F222)
            012 - Electrical Fault in Circuit - Intermittent

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
   Part No SW: 1T0 959 702 M    HW: 1T0 959 702 M
   Component: Tuer-SG         008 2006 
   Coding: 0000560
   Shop #: WSC 35110 377 08192
   VCID: 42DD46CBA885E47A09F-8016

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 1K0-035-1xx-56.clb
   Part No: 1K0 035 186 AF
   Component: Radio GR0       036 0034 
   Revision: 0003606S    Serial number: VWZ2Z2H1236451
   Coding: 0020200
   Shop #: WSC 35110 377 08192
   VCID: 6A8DCE6BF075DC3AE1F-803E

No fault code found.

End----------(Elapsed Time: 00:51, VBatt start/end: 14.1V/14.2V)-----------

 

[LED Sandwich]

HI All im still having this issue and havent got any closer to resolving it. I found a few videos online regarding hot start issues and a vcds coding fix such as this one below.

I thought it would be worth a try but when i tried to code it in channel 1 came back with an "error channel 01 not available "and wouldnt let me do it. Does anyone know a work aorund.

 

[Uwe]

I found a few videos online regarding hot start issues and a vcds coding fix such as this one below.

I see nothing "below".

My guess is what you found is applicable to older, distributor-pump engines, while you have a unit-injector "Pumpe-Düse" engine.

I thought it would be worth a try but when i tried to code it in channel 1 came back with an "error channel 01 not available "and wouldnt let me do it.

Did you do a Security Access first?

-Uwe-

 

[LED Sandwich]

hi uwe appologies i missed the link it was this one below

i did use 12233 for security access first, would it be possible i need a different code?

my van is a 2010 1.9tdi pd engine of that helps

 

[Uwe]

my van is a 2010 1.9tdi pd engine of that helps

Right, you have a BLS engine. The engine in the video above is also a BLS, but in a Golf.

i did use 12233 for security access first, would it be possible i need a different code?

I cannot imagine why.

I thought it would be worth a try but when i tried to code it in channel 1 came back with an "error channel 01 not available "and wouldnt let me do it.

Is the software in your ECU stock or has it been "tuned" / re-mapped?

-Uwe-

 

[LED Sandwich]

thanks for the reply, as far as i’m aware my ecu is all stock and not remapped.

 

[Ballyreagh]

I've seen this before where air is getting into the fuel system via the tandem pump. Normally does it in the morning

 

[LED Sandwich]

Thanks for the reply, I’ll have a go at rebuilding the tandem pump but this only happens hot. I did have a very similar issue to what you describe a year or so ago but that was injector seals leaking causing hard cold start after the vehicle was left. My issue now is only on hot start and when left for a short period. Today I stripped my egr and cleaned it to make sure that wasn’t getting stuck open.

 

[Ballyreagh]

The heat has to be a big clue. My experience of your symptoms was always cold and the next morning. I never rebuilt the tandem pump to fix the issue, just replaced the gasket where I believe the air was getting in.

 

[LED Sandwich]

Yeah i dont think it will be the pump, ill have another play and see if i can find anything else. i stripped out the egr and did find a few big lumps inside that so have cleaned and re fitted it but im really clutching at straws

 

[LED Sandwich]

Hi all so frustratingly I still haven’t managed to get to the bottom of this one. I rebuilt the tandem pump with no change. One thing I did winder is if a rattly dual mass could cause stalling on hot start. It’s only the hot start videos I’ve seen are long cranking to start where as mine stalls then is hard to start after.

 

[dareckim11]

Have you checked the electric fuel pump, the one in the fuel tank. What is the pressure she does, is there any pressure?

 

[LED Sandwich]

I haven’t checked it but the car starts and runs fine from
Cold and has no issues once running. Can the pressure be checked with vcds or do I need to fit an in line gauge?

 

[dareckim11]

1.9 TDI on the PD, it is probably not possible to check the pressure.
During the warm start, the engine rotates slightly as if it was not compressed?

 

[LED Sandwich]

i have ordered a pressure tester so i’ll check the in tank pump and see how that goes. otherwise i have also swapped out the coolant temperature sensor with no luck.

the engine basically tries to crank but as it fires immediately stalls when hot. i have seen a few things saying it can be timing related on the newer engines but nothing on a pd so maybe that’s a good next port of call.

 

[LED Sandwich]

hi all, so i tested the fuel pressure today. the gauge went to 10psi when priming but dropped to 0 after. i.e didn’t hold pressure however when running it held a steady 6psi. im
not sure what i was expecting but i found something that said 9-15 when priming was normal. would this sound about right for a PD engine?

 

[LED Sandwich]

hi alll, just to update on this. it’s a bit of a lesson in the keep it simple stupid principle. the issue was the starter solenoid, sadly as the starter was only 18 months old i guess i wouldn’t believe the obvious. i’ve swapped out the starter and cleaned the connections again and it’s running fine.

thank you for all your help