Help required with Glowplug timing change V6 3.0 (BKS)

Dietrich · Apr 21, 2020

Hi All

I have a 2007 VW Touareg 3.0 V6 TDi (BKS engine), and sometimes when the car has standed for a few days it really takes time to start. Maybe a good 10 seconds of cranking to start.
I would like to change the time that the glowplugs stays on before starting. I know that it will only glow if the temperature is below 20 deg Celcius (or somewhere there). I saw another thread on TDiClub how to do it but I cannot get to the same adaptation block as mentioned in the thread.

Does anyone know how to do this? If at all possible.

Here is my Autoscan for the same car.

Code:

Tuesday,21,April,2020,15:19:25:53384
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 20.4.1.0 (x64)  HEX-V2 CB: 0.4508.4
Data version: 20200331 DS317.0
www.Ross-Tech.com


VIN: WVGZZZ7LZ7D081342   License Plate: 
Mileage: 279980km-173971mi   Repair Order: 



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


Chassis Type: 7L (6N0)
Scan: 01 02 03 05 08 09 15 16 17 19 22 34 46 47 55 56 68 69 76

VIN: WVGZZZ7LZ7D081342   Mileage: 279980km-173971miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
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: Malfunction 0010
19-CAN Gateway -- Status: OK 0000
22-AWD -- Status: OK 0000
34-Level Control -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
68-Wiper Electr. -- Status: OK 0000
69-Trailer -- Status: Malfunction 0010
72-Door, Rear Right -- Status: OK 0000
76-Park Assist -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 059-907-401-ASB.clb
   Part No SW: 7L0 907 401 F    HW: 7L0 907 401 D
   Component: 3.0L V6TDI  G000AG  0040  
   Revision: --H04---    Serial number: VWX3Z0G1602456
   Coding: 0011775
   Shop #: WSC 31414 790 00001
   VCID: 2E04FF265C0A4DFBF17-5184

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

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 09D-927-750.clb
   Part No SW: 09D 927 750 FA    HW: 09D 927 750 FA
   Component: AL 750 6A           0992  
   Revision: 00H61000    Serial number:               
   Coding: 0004456
   Shop #: WSC 31414 790 00001
   VCID: 72BC2B5688B2291B55F-5160

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 7L0-907-379-MK25E1.clb
   Part No SW: 7L0 907 379 K    HW: 7L0 907 379 K
   Component: ESP ALLRAD MK25E1   0302  
   Revision: 00H53001    
   Coding: 0004482
   Shop #: WSC 31414 790 00001
   VCID: 41DEB49AFDC4C2831C5-8014

1 Fault Found:
00668 - Supply Voltage Terminal 30 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 2
                    Fault Frequency: 2
                    Reset counter: 109
                    Mileage: 276704 km
                    Time Indication: 0
                    Date: 2020.02.23
                    Time: 05:46:14

             Freeze Frame:
                    Count: 64
                    Count: 6145
                    Count: 128
                    Count: 1


-------------------------------------------------------------------------------
Address 05: Acc/Start Auth.        Labels: 3D0-909-13x-05.lbl
   Part No SW: 3D0 909 139 B    HW: 5WK 485 04
   Component:    Kessy            6840  
   Revision: 68406418    Serial number: VWX3Z0G1602456
   Coding: 0000232
   Shop #: WSC 31414 790 00001
   VCID: 2808093E7EBE13CB3BB-807C

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: ELV                 XXXX

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 7L6-907-040.clb
   Part No: 7L6 907 040 AD
   Component: CLIMAtronic R/L     4326  
   Coding: 0020520
   Shop #: WSC 31414 790 00001
   VCID: 72BC2B5688E2291B55F-8026

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 7Lx-937-049-V2.clb
   Part No SW: 7L6 937 049 AF    HW: 7L6 937 049 AF
   Component: J519                2000  
   Revision: -0004---    Serial number: --------------
   Coding: 600004003B201C000000000000000000
   Shop #: WSC 31414 790 00001
   VCID: 0058719EB64E0B8B53B-8054

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 7L0-959-655.lbl
   Part No SW: 7L0 959 655     HW: 7L0 959 655 
   Component: J234  36 VW8T       0250  
   Revision: 92011025    Serial number: 0039P001B61D  
   Coding: 0013110
   Shop #: WSC 31414 790 00001
   VCID: 7AAC0376D092515B1DF-802E

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 7L6-953-549.lbl
   Part No: 7L6 953 549 F
   Component: Lenksaeulenmodul    3501  
   Coding: 0010011
   Shop #: WSC 31414 790 00001
   VCID: 42DCBB96F8C2D99B05F-8016

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 7L6-920-xxx-7L6.lbl
   Part No SW: 7L6 920 890 K    HW: 7L6 920 890 K
   Component: J285 KOMBI-INST.    9733  
   Revision: KHH06X62    
   Coding: 0007101
   Shop #: WSC 61743 001 104857
   VCID: 40D8B19EF68ECB8B13B-8014

1 Fault Found:
00446 - Function Limitation due to Under-Voltage 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 6
                    Fault Frequency: 10
                    Reset counter: 109
                    Mileage: 276195 km
                    Time Indication: 0
                    Date: 2020.01.18
                    Time: 15:50:32


-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 6N0-909-901-7L.clb
   Part No SW: 6N0 909 901     HW: 7L6 920 890 K
   Component: J533  GW-K-CAN TP20 9733  
   Coding: 7FE2E78B42046003
   Shop #: WSC 61743 001 104857
   VCID: 70B8215E86AE1B0BA3B-8024

No fault code found.

-------------------------------------------------------------------------------
Address 22: AWD        Labels: None
   Part No: 0AD 927 755 BE
   Component: TRANSFERCASE        0119  
   Shop #: WSC 00000 000 00000
   VCID: 7F5AF262CBE074732A1-5184

No fault code found.

-------------------------------------------------------------------------------
Address 34: Level Control        Labels: 7Lx-907-553-34.clb
   Part No: 7L0 907 553 G
   Component: LUFTFDR.-CDC- 3C3P1 3112  
   Coding: 0015521
   Shop #: WSC 31414 790 00001
   VCID: 372ADA42A3508C33A21-5184

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 7L0-959-933.lbl
   Part No: 7L6 959 933 
   Component: 12 HSG              7124  
   Coding: 0000065
   Shop #: WSC 30127 001 1048576
   VCID: 7F5AF262CBE074732A1-4B3C

   Subsystem 1 - Part No: 7L0 959 701 R
   Component: Tuersteuergeraet FS 6302

   Subsystem 2 - Part No: 7L0 959 702 R
   Component: Tuersteuergeraet BF 6302

   Subsystem 3 - Part No: 7L6 959 703 
   Component: Tuersteuergeraet HL 0202

   Subsystem 4 - Part No: 7L6 959 704 
   Component: Tuersteuergeraet HR 0202

   Subsystem 5 - Part No: 7L0 907 719 A
   Component:    Neigungssensor   0020

   Subsystem 6 - Part No: 7L6 951 171 B
   Component:    Innenraumsensor  0020

1 Fault Found:
00668 - Supply Voltage Terminal 30 
            002 - Lower Limit Exceeded - Intermittent

-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 7Lx-035-4xx-47.lbl
   Part No SW: 7L6 035 456 B    HW: 7L6 035 456 B
   Component: 08K Audioverst.     0008  
   Revision: 00006000    Serial number: 00000008103370
   Shop #: WSC 00000 000 00000
   VCID: 323CEB564822691B95F-8066

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range        Labels: 7L6-907-357-A.lbl
   Part No SW: 7L6 907 357 A    HW: 7L6 907 357 A
   Component: AFS-Steuergeraet    X014  
   Revision:   H01       Serial number:               
   Coding: 1288451
   Shop #: WSC 31414 790 00001
   VCID: 392EDC7A95149A43545-806C

   Subsystem 1 - Part No: 7L6 941 329 B  Labels: 3D0-941-329.CLB
   Component: AFS-Lst.-Modul l    X008  
   Coding: 00000019

   Subsystem 2 - Part No: 7L6 941 329 B  Labels: 3D0-941-329.CLB
   Component: AFS-Lst.-Modul r    X008  
   Coding: 00000019

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 3B7-035-1xx-56.lbl
   Part No SW: 7L6 035 195 B    HW: 7L6 035 195 B
   Component: Radio DE2           0008  
   Revision: 00004000    Serial number: VWZ4Z4G1014642
   Coding: 0001012
   Shop #: WSC 31414 790 00001
   VCID: 323CEB564822691B95F-8066

No fault code found.

-------------------------------------------------------------------------------
Address 68: Wiper Electr.        Labels: 7L0-955-119-V2.clb
   Part No: 7L6 955 119 A
   Component: J400__ Front Wiper  5101  
   Coding: 0000341
   Shop #: WSC 31414 790 00001
   VCID: 3828D97EAE5E834BABB-806C

   Subsystem 2 - Part No: 1K0 955 559 AB  Labels: 1K0-955-559-AF.CLB
   Component: RLS     190407 020  0105  
   Coding: 00208933
   Shop #: WSC 31414  

No fault code found.

-------------------------------------------------------------------------------
Address 69: Trailer        Labels: 7L0-907-383-1D2.lbl
   Part No SW: 7L0 907 383 G    HW: 7L0 907 383 G
   Component: ANHAENGERELEKTRONIK 8854  
   Coding: 0000001
   Shop #: WSC 31414 790 00001
   VCID: 3828D97EAE1E834BABB-806C

3 Faults Found:
02564 - Trailer; Left Tail Lamps (M60) 
            011 - Open Circuit
             Freeze Frame:
                    Count: 0
                    Count: 0

02563 - Trailer; Right Tail Lamps (M61) 
            011 - Open Circuit
             Freeze Frame:
                    Count: 0
                    Count: 0

02562 - Trailer; Brake Lamps 
            011 - Open Circuit
             Freeze Frame:
                    Count: 0
                    Count: 0


-------------------------------------------------------------------------------
Address 76: Park Assist        Labels: Redir Fail!
   Part No: 7L0 919 283 F
   Component: 0E Einparkhilfe     1107  
   Shop #: WSC 00000 000 00000
   VCID: 392EDC7A95149A43545-806C

No fault code found.

End----------(Elapsed Time: 01:51, VBatt start/end: 12.3V/12.3V)-----------

Uwe · Apr 21, 2020

I'm not aware of a documented way way to change it.

You can see the status of the glow plugs in MVB 012.

Are you turning the ignition on and waiting for the glow plug light to go out before attempting to start it when it is cold and has been standing for a few days?

-Uwe-

Dietrich · Apr 21, 2020

Thank you for your reply Uwe.

Yes I saw the Glow plug status in MVB 012 and because the temperature is above 20 degrees Celcius it is on No pre-glow status.
Yes I will turn the ignition on and wait a while before trying to start. I have actually had this problem for a few years now. I tried all kind of different things before before starting in the last few years. I tried cycling the ingition as well a few times before starting, checking if that will help, but without any luck.
The Treg has 270k km on already but no problems whatsoever, other than this. It's a irritation more than a problem really. I am really happy with this car. This problem is only on the first start of the day after standing unused for a few days. The rest of the day it will start instantly, no problems. I also connect a trickle charger on if not used, so it can't be the battery. I also have the correct VARTA battery and it's not old.

The problem really is that I do not have a code to enter the security code. The ones I have is not working:
12233
26262
27971
If I could just get the right code, I can enter the Long adaptations screen and view the ones blocked by the security code.

I hope you can help.

Dietrich

Gremling · Apr 21, 2020

Could you please ohm each of the GPs, from top center of GP to engine (ground) and report back?

Also seems to be low voltage at terminal 30, is this due to over cranking, or wiring issues?

See the trailer issues as well, are you using an adapter (or left it in socket when not used) from 7 to 13 or 13 to 7? Have seen several of these causing electrical Gremlings (or issues)?

Regards
Gremling

MartinsX · Apr 21, 2020

I'm not sure there is any way to cheat glow time with VCDS, but You can try to cheat ECT sensor measurement by adding additional wires, manual switch and fixed or variable resistor

I did this a lot for old and badly worn audi R5 engines that can't be started at all without glow plugs heated before start. It's not a correct repair but if owner don't want to invest or don't have money for complete engine and HPFP rebuilding...

Dietrich · Apr 22, 2020

@ Gremling:
Thank you for your reply. I measured all before and all are around 1 Ohm. This Low Voltage was a few 1000 km's ago when the battery was about to die probably, There are no such errors currently after I cleared it and tried again.
In South Africa we use the adapter for the trailer and also the wiring on the trailer is different than in most countries. We use only one wire for the lights, not two (left and right). That errors are only from a boat trailer and the lights might have gotten wet with the last launch

The battery is charged and ready to go each time I test this. I will wait a few days before attempting another start and then share the logs here.

@ MartinsX: That might be a good idea to add some potentiometer maybe to the system, but then right after the start remove it again immediately as the electronics might get confused or do something crazy :facepalm:

Do you have any idea of what the normal ohm range is for the temp sensor and where it sits?

Gremling · Apr 22, 2020

Hi again,
Are you skilled as a mechanics or at least have very good understanding of how motor works? If so, you could try this, but at your own risk, as performed incorrectly this WILL damage engine and also can cause harm to car and not to forget involved personnel. Before I give you the below advice, I would like you to understand why the is given.
I had earlier a (spoken out almost silently) a BMW X5, which had some of the same symptoms as you. Although this was most prudent in the range of -3deg C up to +5 deg C. used starter starter aids (tried a few things), car fired right up. So faultfinding and final cause was to high leakage from injector no 5 and 6.

Now to the test.
Again be adviced, performed incorrectly, or with excessive amount of starter gas, engine will be damaged, and upon cracking in can go reverse way. Performed correctly, it can help you determine cause of problem.
Inject/spray only a very small amount of starter gas into inlet of air filter (I mean very small amount a quarter of a second or so from a normal box). Try to start now.
If luck, try this a few times when engine has been still for a while.
If no luck, have one person turning key (engine cranks) and gently spray gas into air filter box inlet. Only short and few burst, keep amount of starter gas within reasonable amount. If car starts, try this again next time engine is hard to start.

Reason for why I did it this way:
Not a problem every time car was to be used. Not big difference in starting in -20deg C og +20 deg C, most difficult to start in the area around 0deg C.

The diesel engine has a high compression ratio, and therefore the air gets hot and diesel can ignite when injected into engine, not as with a petrol engine that needs a spark to ignite the fumes. Diesel engine should be able to start in below 0deg C, without the GPs being glowed (have observed this in many other cars as well, but of course the GPs are there for a reason).

If my suspicion is correct, the car will fire up, and run with the aid of a very small squirt of spray, maybe you need to do so during the cranking as well, to get the starter gas into the cylinders, not overdoing it.
If one or more injectors has a worn seal ring on HP side in the injector, the cranking RPM (HP pump is driven from engine rotation) will not substain/give sufficient pressure in injectors (due to leak thru one or more), and engine will not start. Injecting the very small amount if starter gas, will give engine combustion, and therefore higher rpm of engine and pump flow ond pressure will overcome the leak thru injector(s).

The way I have tested the injectors leak earlier (note that this is of general use, and not tested on this engine), can be done by disconnecting the return line from the injectors and install small hoses from each injector to their own measuring container so they can guide the escaping fuel into each container (measuring cups bottles or whatever, must be able to contain at least 2 dl). Please remember to block of the main return line, where you disconnected the injector return lies, or the fuel will back-flow out from here.

If one or more injector measuring cups/bottles receives more fuel than the other, this can be a strong indication of which injector is leaking, remember that a small amount of return flow is intended (should be there / is normal)
Link to a test performed on a 3letter car X5 3.0tdi: https://www.youtube.com/watch?v=uM4Jj1ZzMMQ

If I remember correctly, the allowed return value/amount from the (spoken barely audiable) BMW X5, injectors combined was 100ml over a 60sek periode, and I had one that alone gave 100ml leak and one with roughly 20ml -> Replaced them with newly overhauled ones and problem solves. I assume that your engine would have somewhat the same allied return flow.

Please read the VAG SSP 350 (if I am not mistaken, regarding the Touareg 3.0tdi engines), and you should then understand the engine.

Again, this can not be told enough, do this at own risk, and do not do this if you are not sure how to to these tests, specially the one with usage og starter gas.

The links below is from the 7ZAP parts list, showing coolant temp sensor G62:
https://7zap.com/en/catalog/cars/volkswagen/brand/20/0/Touareg/Touareg%20(2007%20-%202010)/Volkswagen/ZGRieHlnR0Z4a0VVRGhmdmNmdFYwaDNrZS9xSUZVTm9ybVZ0Z3dJQUNXVHo2SXJIY2c1dWIzWTJiV0FyVCs2eDFGZ1pvS0lFRTNoUkVCUmxYVS9PbnU0ZWp6OWUxbm4xSzJhZ3NmSzZXaVk9/6bbffde8b5b8077d2d0a5796da6eea3c:7f43832742e20c6408081f1dece488f6/manufacturer/1/274121630::121063

Link below shows the location of the Radiator coolant temp sender G83.
https://7zap.com/en/catalog/cars/volkswagen/brand/20/0/Touareg/Touareg%20(2007%20-%202010)/Volkswagen/ZGRieHlnR0Z4a0VVRGhmdmNmdFYwaDNrZS9xSUZVTm9ybVZ0Z3dJQUNXVHo2SXJIY2c1dWIzWTJiV0FyVCs2eDFGZ1pvS0lFRTNoUkVCUmxYVS9PbnU0ZWp6OWUxbm4xSzJhZ3NmSzZXaVk9/6bbffde8b5b8077d2d0a5796da6eea3c:7f43832742e20c6408081f1dece488f6/manufacturer/1/274121640::121064

Hope this helps a bit, and be careful

Regards
Gremling

Dietrich · Apr 22, 2020

Wow Gremling, thank you for the advice. This is really comprehensive advice.
I do have some knowledge of motors and mechanics. It's not my day job but I do it as a hobby.

I will try this with the quick-start can and then see what happens. And don't worry, I do understand the risk involved of using too much. Thank you for your concern, and I agree it is a dangerous trick.
I will also do the trick with the small bottles on the injectors return line, that is a very good idea. We are currently in lock-down (Due to COVID-19), so all shops are closed and I doubt if I have 6 of those small bottles like in the video, but I will make a plan. I will make a video and also share it with you, if I manage. Also the quick-start I will have to wait for the shops to open up again after the lock-down. Here in South Africa, everything is closed.

I do have the SSP 350, and I did read up on the cooling system actually earlier today, thank you. I will go and check the proper functioning of the fuel system in there.

The links on 7Zap are also great, I found the temp sensor easily on there, thanks. Here is also a video that I found on that: https://www.youtube.com/watch?v=kWjuhFO1png

Thanks again for the great advice!!
Regards
Dietrich

Jack@European_Parts · Apr 22, 2020

Did you know that In industrial applications or swing climates, you can take an old manual oven timer, a relay, a inline fuse protection and a resistor depending on how glows are required to light initially, than pull back starting voltage to insure glows can't get smoked?

Did you also know this way it can run inline and during the warm up period or pre light before a key is turned on or to initiate the standard function/cranked without error at operation without a DTC?

Dietrich · Apr 22, 2020

Jack@European_Parts said:
Did you know that In industrial applications or swing climates, you can take an old manual oven timer, a relay, a inline fuse protection and a resistor depending on how glows are required to light initially, than pull back starting voltage to insure glows can't get smoked?

Did you also know this way it can run inline and during the warm up period or pre light before a key is turned on or to initiate the standard function/cranked without error at operation without a DTC?

Hi Jack@European_Parts

That is another option but can you maybe draw up a schematic of that on a piece of paper please? Not sure I follow all your steps.
Or maybe just a manual switch?

Dietrich · Apr 22, 2020

Gremling said:
The way I have tested the injectors leak earlier (note that this is of general use, and not tested on this engine), can be done by disconnecting the return line from the injectors and install small hoses from each injector to their own measuring container so they can guide the escaping fuel into each container (measuring cups bottles or whatever, must be able to contain at least 2 dl). Please remember to block of the main return line, where you disconnected the injector return lies, or the fuel will back-flow out from here.

If one or more injector measuring cups/bottles receives more fuel than the other, this can be a strong indication of which injector is leaking, remember that a small amount of return flow is intended (should be there / is normal)
Link to a test performed on a 3letter car X5 3.0tdi: https://www.youtube.com/watch?v=uM4Jj1ZzMMQ

@Gremling

I performed the injector leak test that you mentioned. I just used 10ml syringes and let it run for 2 minutes. The result was mostly the same volume on all as you will see in the video. One was not way more than another.

Here's the video link: https://www.youtube.com/watch?v=srmEShJeAX0

Please let me know what you think.

Jack@European_Parts · Apr 22, 2020

Hi Jack@European_Parts

That is another option but can you maybe draw up a schematic of that on a piece of paper please? Not sure I follow all your steps.
Or maybe just a manual switch?

No manual switches and no I will not instruct on how to do this, time to self educate yourself on circuits and take responsibility for your own paths chosen.

Not to be mean either, it's just a liability.

Have you checked that the ECT/IAT are working proper at respective temp condition exists and are fuels primed adequately as per RTFB?

MartinsX · Apr 22, 2020

If I remember correct, BKS has so called "fast glow" plugs. They are controlled from their own control module, only first second they get full 12V, then power is reduced by switching to PWM signal. If powered directly from constant battery voltage, they will be damaged in first 20 sec...
I may be wrong according this exact T'reg engine, I'm too lazy and busy with my own things to dig in manuals right now, but Q7 3,0 TDI CR engine has the glow system as described above, I'm sure for 100%.

MartinsX · Apr 22, 2020

Dietrich said:
@ MartinsX: That might be a good idea to add some potentiometer maybe to the system, but then right after the start remove it again immediately as the electronics might get confused or do something crazy
Do you have any idea of what the normal ohm range is for the temp sensor and where it sits?

Use RTFB and Your brain

Even if there is no ECT sensor temperature/resistance chart in repair manual for Your engine, take any older VAG repair manual. ECT sensor temperature/resistance chart is the same for decades

Dietrich · Apr 23, 2020

Sure no problem, will read up a bit.

Yes, when the car has standed for a while thie ECT and IAT reads basically the same, so I think sensors are still fine as temperature on ECT goes up as it should and IAT fluctuate a little during driving depending one where you are driving.

Yes I tested fuel pressure and the in-tank pump works as it should as well. On another forum site they got to the conclusion to change the starter as VW brought out a better and bigger starter for the BKS engine apparently.

Dietrich · Apr 23, 2020

MartinsX said:
Use RTFB and Your brain
Even if there is no ECT sensor temperature/resistance chart in repair manual for Your engine, take any older VAG repair manual. ECT sensor temperature/resistance chart is the same for decades

Thanks for your ideas.
Yes, I found an old EGT sensor with the same plug that I can use to plug in and test the resistance while still in line. Test when cold, engine still off. Then drive around to get it up to temperature and test again while off. All this just to be on the safe side.

Gremling · Apr 23, 2020

Hi, difficult to see exactly how much return flow is. Maybe try with cola or other see thru bottles

, an perform test from cold engine and run for one minute. Measure amount of returns. Just from what i saw, it seemed like return flow would be 60ml or more. That could be enough to give starting problems, but ask a Audi qualified workshop, what the go no go sum is. Both for individual leak and combined leak.

Or even better, ask a well reputationed diesel pump and injector repair shop, and get a price for refurbishing all 6 if necessarry. I paid roughly £130 for service of 2 injectors.

Help required with Glowplug timing change V6 3.0 (BKS)

Dietrich

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