My 1.9 PD has done 170k now.

 

On a dead cold engine start, often there is a cloud of grey smoke from the exhaust for roughly 5 seconds. Sometimes there is a noticeable wobble on idle, although not always.

It never seems to do it when the engine is already warned up or has been used within the last few hours.

 

If I start driving straight away, the smoke disappears. When driving, even with my foot hard down there doesnt appear to be any noticeable smoke in my rear view mirror.

 

I've also noticed an increase in fuel consumption lately. Running on level ground at 60mph before the instant mpg readout would easily be in the 60s.

Now I have to really feather the throttle to get it to even stay in the 50s.

 

I have vcds. What would be a good place to start investigating?

 

I have read fuel injector seals can have this affect, but can I even prove that with vcds?

 

I don't want to start replacing parts unnecessarily.

Edited 12 August, 20196 yr by softscoop

Have you checked the glow plugs?

They were all changed for genuine Bosch ones 18 months ago.

Come what may; your title and OP made me immediately think "glow plugs". You have changed the plugs themselves, but have you continuity tested the wiring?

The glow plugs were changed by a vag specialist.

2 showed as faulty before so I got all 4 done.

 

I'll post a full autoscan shortly.

Here is the scan.

 

VIN: TMBGS21Z962141048   License Plate: 

Mileage: 278840km-173263mi   Repair Order: 

 

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

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

 

Chassis Type: 1Z (1K0)

Scan: 01 02 03 08 09 15 16 17 19 25 42 44 46 52 56 62 72 76 77

 

VIN: TMBGS21Z962141048   Mileage: 278840km/173263miles

 

01-Engine -- Status: Malfunction 0010

02-Auto Trans -- Status: OK 0000

03-ABS Brakes -- Status: OK 0000

04-Steering Angle -- Status: OK 0000

08-Auto HVAC -- Status: OK 0000

09-Cent. Elect. -- Status: Malfunction 0010

15-Airbags -- Status: OK 0000

16-Steering wheel -- Status: Malfunction 0010

17-Instruments -- Status: OK 0000

19-CAN Gateway -- Status: Malfunction 0010

25-Immobilizer -- Status: OK 0000

42-Door Elect, Driver -- Status: OK 0000

44-Steering Assist -- Status: OK 0000

46-Central Conv. -- Status: OK 0000

52-Door Elect, Pass. -- Status: OK 0000

56-Radio -- Status: Malfunction 0010

62-Door, Rear Left -- Status: Malfunction 0010

72-Door, Rear Right -- Status: OK 0000

76-Park Assist -- Status: OK 0000

77-Telephone -- Status: Not registered 0001

 

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

Address 01: Engine        Labels: 03G-906-016-BKC.lbl

   Part No SW: 03G 906 016 BE    HW: 028 101 194 7

   Component: R4 1,9L EDC G000AG  7000  

   Revision: 12345678    Serial number: SKZ7Z0E3079907

   Coding: 0000078

   Shop #: WSC 73430 790 00000

   VCID: 67DD5D1756980F26359-8032

 

2 Faults Found:

18104 - Powertrain Data Bus 

            P1696 - 000 - Implausible Message from Steering Column Controller

             Freeze Frame:

                    RPM: 0 /min

                    Torque: 0.0 Nm

                    Speed: 0.0 km/h

                    Load: 0.0 %

                    Voltage: 12.08 V

                    Bin. Bits: 00001100

                    Bin. Bits: 00000000

                    (no units): 1.0

 

18049 - Please check DTC Memory of A/C Controller 

            P1641 - 000 -  - Intermittent

             Freeze Frame:

                    RPM: 1575 /min

                    Torque: 0.0 Nm

                    Speed: 33.0 km/h

                    Load: 0.0 %

                    Voltage: 14.14 V

                    Bin. Bits: 11001000

                    Temperature: 65.7°C

                    (no units): 0.0

 

Readiness: 0 0 0 0 0 

 

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

Address 02: Auto Trans        Labels: 02E-300-0xx.lbl

   Part No SW: 02E 300 042 H    HW: 02E 927 770 AE

   Component: GSG DSG         070 0910  

   Revision: 04507000    Serial number: 00000506220728

   Coding: 0000020

   Shop #: WSC 73430 790 00000

   VCID: 183F2EEB2B6670DE4C3-804D

 

No fault code found.

 

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

Address 03: ABS Brakes        Labels: 1K0-907-379-MK60-F.lbl

   Part No SW: 1K0 907 379 Q    HW: 1K0 907 379 Q

   Component: ESP FRONT MK60      0102  

   Revision: 00T12001    

   Coding: 0004738

   Shop #: WSC 73430 790 00000

   VCID: 408FA68B1376181ED43-8015

 

No fault code found.

 

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

Address 08: Auto HVAC        Labels: 1K0-907-044.lbl

   Part No: 1Z0 907 044 H

   Component: ClimatronicPQ35 084 0305  

   Shop #: WSC 00000 000 00000

   VCID: 3B75D1677A907BC6811-806E

 

No fault code found.

 

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

Address 09: Cent. Elect.        Labels: 3C0-937-049-23-H.lbl

   Part No SW: 1K0 937 049 N    HW: 1K0 937 049 N*

   Component: Bordnetz-SG     H34 0803  

   Revision: 00H34000    Serial number: 00000003431117

   Coding: 618A0F1310960A0032110D00000000001E097F065C

   Shop #: WSC 25043 576 17493

   VCID: 3A7BD46375AA42CE9A7-806F

 

   Subsystem 1 - Part No: 1Z2 955 119 A  Labels: 1KX-955-119.CLB

   Component: Wischer SK351  012 0401  

   Coding: 00065525

   Shop #: WSC 25043  

 

   Subsystem 2 - Part No: 1K0 955 559 R  Labels: 1K0-955-559-AF.CLB

   Component: RegenLichtSens 010  1010  

   Coding: 00471077

   Shop #: WSC 25043  

 

1 Fault Found:

02390 - Control / Regulation for Ambience Lighting (E400) 

            009 - Open or Short to Ground

 

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

Address 15: Airbags        Labels: 1K0-909-605.lbl

   Part No SW: 1K0 909 605 N    HW: 1K0 909 605 N

   Component: Q4 AIRBAG VW8   015 2100  

   Revision: 03015000    Serial number: 0038ED0H7WW/  

   Coding: 0020788

   Shop #: WSC 73430 790 00000

   VCID: 377DCD5746B85FA6659-8062

 

   Subsystem 1 - Serial number: 6332MSME0B0D14617

 

   Subsystem 2 - Serial number: 6342MSME0B0D14629

 

No fault code found.

 

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

Address 16: Steering wheel        Labels: 1K0-953-549-MY8.lbl

   Part No SW: 1K0 953 549 AG    HW: 1K0 953 549 AG

   Component: J0527           034 0070  

   Coding: 0012042

   Shop #: WSC 73430 790 00000

   VCID: 77FD0D5706389FA6A59-8022

 

   Subsystem 1 - Part No: XXXXXXXXXXX 

   Component: E0221           007 0050

 

1 Fault Found:

00895 - Cruise Control Switch (E45) 

            014 - Defective

 

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

Address 17: Instruments        Labels: 1K0-920-xxx-17.lbl

   Part No: 1Z0 920 941 D

   Component: KOMBIINSTRUMENT VD1 0918  

   Coding: 0007401

   Shop #: WSC 24000 186 85313

   VCID: 387FCE6B4BA650DE6C3-806D

 

No fault code found.

 

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

Address 19: CAN Gateway        Labels: 1K0-907-530-V4.clb

   Part No SW: 1K0 907 530 AA    HW: 1K0 907 951 

   Component: J533  Gateway H16 0222  

   Revision:   H16 Serial number: 4020K097010B0D

   Coding: ED807F0E000202002303

   Shop #: WSC 06314 123 12345

   VCID: 66C350135192162E0EF-8033

 

1 Fault Found:

01044 - Control Module Incorrectly Coded 

            000 - -

             Freeze Frame:

                    Fault Status: 01100000

                    Fault Priority: 1

                    Fault Frequency: 254

                    Reset counter: 79

                    Mileage: 250171 km

                    Time Indication: 0

 

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

Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb

   Part No: 1Z0 920 941 D

   Component: IMMO            VD1 0918  

   Shop #: WSC 00000 000 00000

   VCID: 387FCE6B4BA650DE6C3-806D

 

No fault code found.

 

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

Address 42: Door Elect, Driver        Labels: 1K0-959-701-MIN2.lbl

   Part No: 1T0 959 701 B

   Component: Tuer-SG         024 2346  

   Coding: 0000758

   Shop #: WSC 73430 790 00000

   VCID: 3663C05341B2A6AE7EF-8063

 

No fault code found.

 

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

Address 44: Steering Assist        Labels: 1Kx-909-14x-44.clb

   Part No: 1K2 909 144 J

   Component: EPS_ZFLS Kl.5   D04 1606  

   Shop #: WSC 00000 000 00000

   VCID: 3365F94752C0B386591-8066

 

No fault code found.

 

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

Address 46: Central Conv.        Labels: 1K0-959-433-MIN.clb

   Part No: 1K0 959 433 AK

   Component:    KSG   0401  

   Coding: 18D002407F2D850D485F861004CC

   Shop #: WSC 73430 790 12345

   VCID: 79F90B6F302C89D6D3D-802C

 

   Subsystem 5 - Part No: 1Z0 951 171 

   Component: Innenraumueberw.008 4801  

   Coding: 00000000

   Shop #: WSC 00000  

 

   Subsystem 6 - Part No: 1K0 951 605 C

   Component: LIN BACKUP HORN H05 1501

 

   Subsystem 7 - Component:       NGS n.mounted     

 

No fault code found.

 

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

Address 52: Door Elect, Pass.        Labels: 1K0-959-702-MIN2.lbl

   Part No: 1T0 959 702 B

   Component: Tuer-SG         024 2346  

   Coding: 0000758

   Shop #: WSC 73430 790 00000

   VCID: 377DCD5746B85FA6659-8062

 

No fault code found.

 

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

Address 56: Radio (J503)       Labels: 5M0-035-1xx-56.clb

   Part No SW: 1Z0 035 156 G    HW: 1Z0 035 156 G

   Component: BOLERO        013 0029  

   Revision: -----27S    Serial number: SKZ4Z3K1104363

   Coding: 010004000001

   Shop #: WSC 73430 790 00999

   VCID: 3663C05381B2A6AE7EF-8063

 

2 Faults Found:

00856 - Radio Antenna 

            011 - Open Circuit

             Freeze Frame:

                    Fault Status: 01101011

                    Fault Priority: 5

                    Fault Frequency: 254

                    Reset counter: 71

                    Mileage: 214898 km

                    Time Indication: 0

                    Date: 2000.00.00

                    Time: 14:19:52

 

00821 - Antenna 2 for Radio (R93) 

            011 - Open Circuit - Intermittent

             Freeze Frame:

                    Fault Status: 00101011

                    Fault Priority: 5

                    Fault Frequency: 28

                    Reset counter: 102

                    Mileage: 261243 km

                    Time Indication: 0

                    Date: 2000.00.00

                    Time: 14:02:57

 

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

Address 62: Door, Rear Left        Labels: 1K0-959-703-GEN2.lbl

   Part No: 1K0 959 703 E

   Component: Tuer-SG         021 2405  

   Coding: 0000144

   Shop #: WSC 73430 790 00000

   VCID: 326BFC43ADDABA8E527-8067

 

1 Fault Found:

00934 - Electric Window Motor; Rear Left (V26) 

            005 - No or Incorrect Basic Setting / Adaptation - Intermittent

 

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

Address 72: Door, Rear Right        Labels: 1K0-959-704-GEN2.lbl

   Part No: 1K0 959 704 E

   Component: Tuer-SG         021 2405  

   Coding: 0000144

   Shop #: WSC 73430 790 00000

   VCID: 3365F94752C0B386591-8066

 

No fault code found.

 

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

Address 76: Park Assist        Labels: 1Z0-919-283.lbl

   Part No SW: 1Z0 919 283 C    HW: 1Z0 919 283 C

   Component: Parkhilfe 8-Kan H04 0020  

   Coding: 0001001

   Shop #: WSC 73430 790 00000

   VCID: 3E73D87369826EEEA6F-806B

 

No fault code found.

 

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

Address 77: Telephone

Cannot be reached

 

End   ---------------------------------------------------------------------

 

I have just checked the glow plugs with a multimeter.

All 4 plugs have 0.6ohm resistance between the tip of the plug and the engine block. 

This is measuring block 13 on the engine just after a cold start - the engine had been off since 6.30 this morning.

 

-0.45  -0.19  0.33  0.33

 

After a few minutes idling these are the figures.

 

-0.35  0.07  0.09  0.16

 

It won't let me upload the screenshots annoyingly 

 

Edited 12 August, 20196 yr by softscoop

I think I'll run a can of Liqui Moli Diesel Purge through the system.

 

Am I right in thinking the bottom two pipes on top of the fuel filter housing are what go in the can, and the top 2 connect together to send the fuel from the pump back to the tank?

 

I've got no idea about the fuel filter I usually just stick my injector cleaner or fuel booster into the tank 

So a few months later, I'm still getting poor MPG.

 

I ran a can of Liqui Moli Diesel Purge by bypassing the fuel filter, and that seems to have cured the smoke on cold start however.

 

I gave the MAF a clean with some proper MAF clever. Still the same.

Running with it disconnected is also the same.

 

I ran some logs on vcds and on a 15 mile run EGR requested Vs actual was within 2% and boost requested Vs actual was within 6%.

 

Any idea where to start looking next?

25 minutes ago, softscoop said:

a few months later, I'm still getting poor MPG.

I find that the component that most affects MPG is the one between the throttle pedal and my right ankle.

 

Seriously, the most I've got is that the MAF seems to be OK.

I also forgot to mention I checked the brakes again this morning.

After a 15 mile drive of barely touching the brakes, the hubs, discs and calipers were stone cold.

 

I doubt it's my driving style as even feathering the throttle at 60mph on a flat road the instant consumption hovers around 51. Before it would easily be in the 60s.

could it be a faulty sensor showing high fuel consumption rather than actual consumption. 

Pen and paper check will show actual MPG against readings.   ie full tank to empty tank = xxx miles, / fuel ( gallons or litres ).  

I am definitely getting less mileage from a full tank. 

 

Next time I fill up I'll work it out properly.

So after filling it up, actual mpg is 41.8. 

 

Trip 2 was showing 49 average, but that hasn't been reset in a long while.

 

I've reset trip 2 this time and will compare it directly to actual next time I fill up 

On my Superb I the mpg on the trip computer seemed to drop - however the real life tank to tank remained the same. Actual consumption depends on driving style but a real life 60mpg on a DSG ps seems too high. 

 

I'd be more concerned about some of the electrical gremlins shown on your scan above - sometimes weird readings can be due to a failing battery (usually shows up in the electrical power steering first as it's a high current draw device). 

Edited 24 October, 20196 yr by bigjohn

On 11/10/2019 at 08:23, softscoop said:

 

I gave the MAF a clean with some proper MAF clever. Still the same.

Running with it disconnected is also the same.

 

 

If the car runs the same with MAF plugged in and unplugged I would say the MAF is no good, it should run better on a good MAF than without one plugged in

I know that P1696 is related to my faulty cruise control stalk 

 

I've just fitted a new MAF. Will see how it goes.

So the results are in.

New maf has been fitted for a full tank.

 

There is no noticeable difference in the way the car drives with old MAF, no MAF or the new maf.

 

I reset trip 2 last time I filled up.

That said 46.2 average.

 

Calculated based on mileage covered... 39mpg.

 

I may as well have a petrol at this rate.

 

Any idea where to look next?

Is there power going to the MAF ?

 

I assume so.

 

After a day or so of running with the MAF disconnected, the engine light comes on with Emissions workshop on the maxidot.

 

Reconnecting either MAF clears it off.

Cam timing, VCDS has some weird name for the function like torsion value.

 

If a cam belt has been fitted without the vernier adjustment being done using VCDS then it will likely be out, if its been done by anyone but an extremely patient and determined owner then it could be even worse than not doing it at all.

It had a cambelt done in Feb, but fuel economy was fine then. Vcds showed torsion value bang on 0 last time I checked.

 

I'll check again tomorrow

Checked again this morning. Torsion in group 4 shows 0.