BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
Hi,
After getting the oil leak sorted on my BAG engine (turned out to have a stripped thread on one of the bolts for the timing chain cover) the car has started to stutter when driving along at between 30-50mph.
You can feel the engine almost slightly cough or misifre.....
I've not detected a misifre on VCDS using the measuring blocks.
I've also got no error codes to help with diagnose the issue.....unless it is a mechanical issue.....like the timing being ever so slightly out perhaps?
I did use all the proper tools for the timing chain job and the car was running sweet before sorting the stripped thread on the engine block for the timing chain cover.
What should I be logging on VCDS to help me find out the issue?
I was thinking I need to look at fuel pressures, RPM, EGR? But I haven't got much of an idea in fairness.
Could this issue be related to a bad low pressure fuel pump (LPFP) or high pressure fuel pump (HPFP)......cam follower / bucket was changed a while back but when doing the engine
swap it looked in good condition when I took it out. The relay for the LPFP was also replaced a year or 2 ago with a genuine VW part.
The injectors were also all ultrasonically cleaned using an ASNU machine so not suspecting a bad injector.
Perhaps its an air leak, or maybe a bad spark plug or coil pack but not getting any codes for them?
Any help would be appreciated.
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
To me that is running lean, I would check the lambda correction values. A quick test is to turn off the Lambda control in Basic Settings 099 and see if the hesitation clears but not for too long as it can upset the cat. By the way, according to VAG cleaning FSI injectors damages them and makes then run... lean.
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
Could removing the timing chain and have timing off make the engine run slightly lean?
Seems very strange as it was running perfectly well before the thread reapir....no stuttering or "lean" condition.....
Running lean can also be caused by air leaks too right? Should I be looking for something like that or not?
What MVB blocks in VCDS do I need to look at......is this what they call "fuel trims" or is lambda correction values something else?
I remember reading something about them and the value should change from +VE and -VE.....but I could getting confused here.
I am just trying to pin point what else I might have done during the thread reapair on the block that may have caused this.....
I did release the engine from its mounts and used an engine support to lower the engine to get enough access so I had line of sight with a drill.....
Just thinking whether this may have pulled on the wiring harness or something?
Ah bugger so I may ruined the injectors by cleaning them? They did seem fine after having them cleaned and didn't notice any issues....
After doing the lambda check would it be worth changing out the injectors for some other ones? (Obviously replacing the teflon seals and o rings with new ones too).
Never done the 099 basic setting.....what will happen exactly? and how long is too long? Can I drive a couple of miles, 10 miles? Just don't want to cause damage to the cat.......(the downpipe cat was
replaced with a non genuine part / aftermarket as they were far too expensive....
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
Fault codes scan from VCDS.....
Code:
Friday,13,August,2021,18:06:20:33544
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 21.3.0.0 (x64)
Data version: 20210226 DS325.0
www.Ross-Tech.com
VIN: WVWZZZ1KZ4W096975 License Plate:
Chassis Type: 1K (1K0)
Scan: 01 03 08 09 15 16 17 19 25 42 44 46 52 56
VIN: WVWZZZ1KZ4W096975 Mileage: 367880km-228590miles
00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
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
44-Steering Assist -- 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: 03C-906-056-BAG.lbl
Part No SW: 03C 906 056 BA HW: Hardware No
Component: MED9.5.10 G00 5697
Revision: 00000000 Serial number: VWZ7Z0D9331576
Coding: 0000072
Shop #: WSC 01279 785 00200
VCID: 63C1C201A2D6B093BE-8036
1 Fault Found:
18729 - Oxygen (Lambda) Sensor B1 S1
P2297 - 001 - Control Range Exceeded during Deceleration
Readiness: 0000 0000
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1K0-907-379-MK60-F.lbl
Part No: 1K0 907 379 K
Component: ESP FRONT MK60 0103
Coding: 0019073
Shop #: WSC 01279 785 00200
VCID: 3A7F5F6575DC915BCD-806E
No fault code found.
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 1K0-820-047.lbl
Part No: 1K0 820 047 CB
Component: Climatic PQ35 080 0201
Shop #: WSC 00000 000 00000
VCID: 66C7DB1551E4C5BB59-8032
1 Fault Found:
00229 - Refrigerant Pressure
002 - Lower Limit Exceeded
-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels:. 3C0-937-049-23-M.lbl
Part No SW: 1K0 937 049 K HW: 1K0 937 049 K*
Component: Bordnetz-SG 1.0 H30 0701
Revision: 00030000 Serial number: 00000000514812
Coding: E48D0F0600041800001400001400000000
Shop #: WSC 00000 000 00000
VCID: 3779465146CE8C3332-8062
Subsystem 1 - Part No: 1K2 955 119 B Labels: 1KX-955-119.CLB
Component: Wischer VW350 012 0401
Coding: 00065493
Shop #: WSC 00000
Subsystem 2 - Part No: 1K0 955 559 K Labels: 1K0-955-559-AF.CLB
Component: RegenLichtSens 002 0505
Coding: 00217125
Shop #: WSC 00000
1 Fault Found:
01049 - Supply Voltage Term 50
006 - Short to Plus - Intermittent
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 1K0-909-605.lbl
Part No SW: 1K0 909 605 A HW: 1K0 909 605 A
Component: 0M AIRBAG VW8 022 0500
Revision: 04022000 Serial number: 0033FD08P0VC
Coding: 0012365
Shop #: WSC 01268 785 00200
VCID: 2A5F6F25857C21DBBD-807E
Subsystem 1 - Serial number: 6332MSME5D7E1002
Subsystem 2 - Serial number: 6342MSME57340A02
Subsystem 3 - Serial number: 6351HSME43485801
Subsystem 4 - Serial number: 6361HSME5D0F5901
No fault code found.
-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 1K0-953-549-MY8.lbl
Part No SW: 1K0 953 549 A HW: 1K0 953 549 A
Component: Lenksäulenmodul 012 0030
Coding: 0000022
Shop #: WSC 01279 785 00200
VCID: 306B7D4DA3A05B0B73-8064
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1K0-920-xxx-17.lbl
Part No: 1K0 920 950 K
Component: KOMBIINSTRUMENT VDD 3554
Coding: 0000401
Shop #: WSC 00218 210 03908
VCID: 306B7D4DA3A05B0B73-8064
No fault code found.
-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels:. 1K0-907-530-V1.clb
Part No SW: 1K0 907 530 C HW: 1K0 907 951
Component: Gateway H08 0080
Revision: 08 Serial number: 2100104128EF35
Coding: 3D0F0340070003
Shop #: WSC 01279 785 00200
VCID: 27599611966E1CB3A2-8072
No fault code found.
-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 1K0-920-xxx-25.clb
Part No: 1K0 920 950 K
Component: IMMO 3554
Shop #: WSC 00000 000 00000
VCID: 306B7D4DA3A05B0B73-8064
No fault code found.
-------------------------------------------------------------------------------
Address 42: Door Elect, Driver Labels: 1K0-959-701-MIN1.lbl
Part No: 1K0 959 701 E
Component: Tuersteuergeraet 09 0116
Coding: 0000052
Shop #: WSC 01279 785 00200
VCID: 306B7D4DA3A05B0B73-8064
No fault code found.
-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 1Kx-909-144-G2V1.clb
Part No: 1K2 909 144 E
Component: EPS_ZFLS Kl.1 1202
Shop #: WSC 00000 000 00000
VCID: 2E576335B9944DFB61-807A
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels:. 1K0-959-433-MIN.clb
Part No: 1K0 959 433 BL
Component: 01 KSG 0301
Coding: 81E802087F2D8505485BC61000
Shop #: WSC 00218 210 08203
VCID: 7BF19A613A66685396-802E
Subsystem 1 - Part No: 1K0 951 605 C
Component: LIN BACKUP HORN H05 1501
Subsystem 2 - Part No: 1K0 907 719
Component: Neigungssensor 003 0003
Subsystem 3 - Part No: 1K0 951 177
Component: Innenraumueberw.004 0101
1 Fault Found:
01134 - Alarm Horn (H12)
004 - No Signal/Communication
-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. Labels: 1K0-959-702-MIN1.lbl
Part No: 1K0 959 702 E
Component: Tuersteuergeraet 09 0116
Coding: 0000052
Shop #: WSC 01279 785 00200
VCID: 316D7849A8AA52037C-8064
No fault code found.
-------------------------------------------------------------------------------
Address 56: Radio Labels: 1K0-035-1xx-56.lbl
Part No: 1K0 035 186 J
Component: Radio BNO 0016
Coding: 0040400
Shop #: WSC 01279 785 00200
VCID: 2D556439B49236E358-8078
No fault code found.
End-------------------------(Elapsed Time: 01:36)--------------------------
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
Do a learnt values clear in Adaptation do this three times. Then go into Basic Settings 04 and do a throttle body set and then an EGR set, take the car for a run and do an overrun EGR test, check the Readiness code shows the EGR is OK. Also do a manifold adaption but I suspect you have a small air leak.
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
Thanks Crasher appreciate the help.
how do I perform each of these operations?
learnt clear values clear adaptations - three times?
throttle body reset (this is in basic settings from memory in engine module?)
egr set (engine module basic settings?)
not heard of an egr overrun test??
manufold adaptation too not sure if this is in basic settings on Engine module?
how is readiness checked? In MVB?
if you can provide instructions that would be greatly appreciated.
how do I identify a trace the air leak? Where could that be coming from? Intake or exhaust side? Do I need to do a smoke test or spray with brake cleaner and listen to exhaust nite?
i did perform an egr adaptation and throttle body adapatation yesterday but think car is still spluttering?
they only thing I can think of is that I’ve used a different manifold to cat exhaust stud as it sheared off when removing the Downpipe. Perhaps there is a leak before the oxygen sensor (bank 1 sensor 1).
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
Was also thinking that potentially the change from E5 to E10 might be having a influence here too? But don’t think this is live until September? But I have seen in a few petrol stations that the labelling has changed already to E10.....could this be causing my issue?
I think my engine is impacted by this fuel change and will damage the seals on the injectors due to the higher ethanol content?
would it be worth pulling the injectors and renewing the seals? Or replacing injectors? I do have a spare set that haven’t been cleaned with ultrasonics.
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
With your engine being an early BAG, VAG have stated this engine is not suitable for use with E10, run it on the “protection” grade but to be honest these have always need 99RON since they were introduced… it is just that VAG UK hopped they would get away with it and roughly, they did.
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
No worries I shall run with the RON99 / V Power Shell and see if that makes a difference.
How do I find the small air leak?
Tried the adaptations above but still getting the stutter (no misifre detected according to VCDS though.....)
Re: BAG Engine Underpowered - Stuttering / Dithering / Misfire - What to log on VCDS?
A smoke machine is the usual way if you can't hear it.