[1.6 fsi] - Yet another misfire case

V

VETRA

Member
Greetings gentlemen!

Don't want to take much time, but i need your advice.
1.6FSi.
Works ok (ish) at ide.
Works ok (ish) at full throttle.
Noticeably (but not terribly) misfires at RPMs around 2000-2500.
I read this thread - If you have a 1.6 FSi with random misfire, READ THIS. - cleaned up the earthing point. Didn't help much.
Check engine light shows up from time to time.

VCDS scan is given below.
It shows many errors, but I presume they are caused by the misfires (or not?)

Measuring Blocks channels with misfires show :
at idle:
0 misfires in cylinders 2 and 4
1..5 misfires per 10 seconds in cylinders 1 and 3
at 2400 RPM:
5..10 misfires per 10 seconds in cylinders 2 and 4
40-50 misfires per 10 seconds in cylinders 1 and 3
[typo corrected] - main misfires are in cylinders 1 and 3

I am considering to replace spark plugs - then the ignition coils...
Is this the right direction of thinking?
Or do the error codes say something peculiar?

Thanks everybody
Cheers
Vitaly

Wednesday,02,October,2024,19:43:51:30570
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: 12.12.3.0
Data version: 20140905


VIN: License Plate: A2
Mileage: 221684 Repair Order:



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


Address 01: Engine Labels: Redir Fail!
Control Module Part Number: 036 906 013 F
Component and/or Version: MED7.5.11 4628
Software Coding: 00051
Work Shop Code: WSC 02138
Additional Info: WAUZZZ8Z53N005638 AUZ7Z0B2098087
VCID: 122DCA0A5E18EB8E3D9-5000
8 Faults Found:

17443 - Sensor for NOx (G295)
P1035 - 35-10 - Signal Implausible - Intermittent
18043 - Powertrain Data Bus
P1635 - 35-10 - Missing Message from A/C Controller - Intermittent
16523 - Oxygen (Lambda) Sensor B1 S2
P0139 - 35-00 - Response too Slow
17584 - Bank1: O2 (Lambda) Correction Behind Catalyst
P1176 - 35-00 - Control Limit Reached
17428 - Fuel Pressure Regulation
P1020 - 35-10 - Control Range Exceeded - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - Intermittent
16685 - Cylinder 1
P0301 - 35-10 - Misfire Detected - Intermittent
16687 - Cylinder 3
P0303 - 35-10 - Misfire Detected - Intermittent

Readiness: 0000 0000
 
Last edited:
Hi,
I'm trying to teach myself FSI.

I would clear all those error codes and go for a drive and then do another scan to see what error codes return.
šŸ™‚šŸ‘
 
Clear the DTCs, (errors), go for a drive, then scan again. Some of those DTCs, may well be historic.
Inlet flaps are fine.
Mac.
 
Thank you gents!
I cleared the errors.
The engine still behaves as described (feels a barely noticeable misfiring around 2000-2500 RPM)
Check engine is gone (for the moment).
Will do another scan tomorrow or on Friday.
šŸ˜ŽšŸ¤
 
VETRA said:
Thank you gents!
I cleared the errors.
The engine still behaves as described (feels a barely noticeable misfiring around 2000-2500 RPM)
Check engine is gone (for the moment).
Will do another scan tomorrow or on Friday.
šŸ˜ŽšŸ¤
Click to expand...
From the scan you posted, your VCDS does not have an FSI specific label file.
If your a Lite user, there's a link below to it, and to the A2 HVAC label file. Suggest you add both to the label folder.
If you have full VCDS, installing the latest up date will sort it.
If you could run a log, (Measuring Blocks), of Group 007, 140, & 142 on a drive, that would check out a few suspects
Mac.
Thread 'Updated Label Files for VCDS Lite.' https://www.a2oc.net/community/index.php?threads/updated-label-files-for-vcds-lite.55908/
 
PlasticMac said:
From the scan you posted, your VCDS does not have an FSI specific label file.
If your a Lite user, there's a link below to it, and to the A2 HVAC label file. Suggest you add both to the label folder.
If you have full VCDS, installing the latest up date will sort it.
If you could run a log, (Measuring Blocks), of Group 007, 140, & 142 on a drive, that would check out a few suspects
Mac.
Thread 'Updated Label Files for VCDS Lite.' https://www.a2oc.net/community/index.php?threads/updated-label-files-for-vcds-lite.55908/
Click to expand...
Thanks Mac!
I have the label file - just on a different machine.
Will do a log too šŸ¤
 
I won't interject in Mac's line of pursuit with this - however if you're not sure when the coils and plugs were last changed. I would certainly replace the plugs and start looking for coils to hold in reserve - they must be genuine Bosch or NGK I believe.
 
Greetings..
Here is an update of what's happened in the last days.
First - a remark - a friend of mine asked to borrow the car for a few weeks. So I don't have daily access to the car - mainly on weekends.. And we could not do a log while driving (he was rushing), we only did a stationary one.
On Sunday we replaced the plugs.
The first shock - they were not tightened at all. Cylinder 1 and 2 were ever slightly tightened, cylinders 3 and 4 I could unscrew just by hand without a wrench. :mad:
Here are the photos of the plugs and the coils.
Old plugs were BOSCH, new installed are NGK.
Plug 1 is in the close-up photo.
Plug 2 had uneven marks on it. (I didn't make a close-up photo šŸ¤¦ā€ā™‚ļø)
Plug 3 was quite oily...
However, coil 2 looked worse than coil 3.
Coil 1 is different from the others - apparently it had been replaced in the past.
4E5B1D6D-B2FD-47DA-B4BF-CBEC3A45D8DE_1_105_c.jpeg

1E0CA107-46E7-42BC-ACB4-079276A01A40_1_105_c.jpeg

4D50E81F-1636-482C-83A1-01B9B9500DF1_1_105_c.jpeg

D55ECCEE-194C-43F0-AF5E-4EDB28021078_1_105_c.jpeg


B261E031-9D4D-4A72-85D7-28DE76401EC6_1_105_c.jpeg


8D544805-A90D-46F0-B5B5-A76C8EEC6729_1_105_c.jpeg


8AF79736-5147-4E20-BC8E-EEA8AEAF4FA6_1_105_c.jpeg
 
New plugs installed.
I have swapped the coils :
Coil1 -> into cylinder 2
Coil2 -> into cylinder 1
Coil3 -> into cylinder 4
Coil4 -> into cylinder 3
The misfire situation got slightly better - almost no misfires at idle and much fewer misfires at higher RPMs:
(These are the same cylinders that misfired before, so I conclude - the coils are OK.)
Screenshot 2024-10-11 at 19.17.35.png


Error codes are practically the same as last time:

Address 01: Engine Labels: Redir Fail!
Control Module Part Number: 036 906 013 F
Component and/or Version: MED7.5.11 4628
Software Coding: 00051
Work Shop Code: WSC 02138
Additional Info: WAUZZZ8Z53N005638 AUZ7Z0B2098087
VCID: 122DCA0A5E18EB8E3D9-5000
8 Faults Found:

17414 - Torque Difference Cylinder 3
P1006 - 35-00 - Limit Value Exceeded
17443 - Sensor for NOx (G295)
P1035 - 35-10 - Signal Implausible - Intermittent
17584 - Bank1: O2 (Lambda) Correction Behind Catalyst
P1176 - 35-00 - Control Limit Reached
17428 - Fuel Pressure Regulation
P1020 - 35-10 - Control Range Exceeded - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 -
16686 - Cylinder 2
P0302 - 35-00 - Misfire Detected
16523 - Oxygen (Lambda) Sensor B1 S2
P0139 - 35-00 - Response too Slow
16685 - Cylinder 1
P0301 - 35-10 - Misfire Detected - Intermittent

Readiness: 0000 0001
 
Last edited:
This morning the Check-Engine light is still on, sometimes blinks.

Now waiting for the fuel cap and the N80 valve to arrive in few days.
Hope these will help, otherwise I am a bit lost...
The fuel is premium (98), of course and the oil has been replaced recently.

Thank you guys!
 
VETRA said:
@PlasticMac, as you said, I did a log of channels 140 and 142:
View attachment 130059

Log file is attached (CSV file renamed to TXT due to forum restrictions)
Click to expand...
You don't have the label file for the FSI, in VCDS. That's why you have "REDIR FAIL" at the top left of the screen.
If you're running VCDS Lite, there's a link at the bottom of this post to a download.
That's also why the descriptions under each block are nonsense.
Based on the short log, all is well with flaps and fuel pressure, but a dynamic log, when there's heavier demand on fuel especially, is required, especially with the "Fuel Pressure Regulation" DTC.
It looks like the combined post cat lambda, and NOx sensors, in the second NOx cat are suspect, but may be a symptom, rather than a cause.
I'd concentrate on the fuel pressure first, so a dynamic log please.
Can you see any part number, brand name, and date code, on those coil packs?
The FSI is very particular about coil packs, and pattern ones are of poor quality, and will cause misfires. Bosch, NGK, Denso, and genuine VAG are good. Early VAG coil packs were not so good, so if they are the original Audi parts, (the date code will tell you), replace them, and check the main engine earth behind the headlight. If the engine earth is not perfect, ignition performance is the first to suffer.
Mac.
PlasticMac

Thread 'Updated Label Files for VCDS Lite.'

I've just updated the Instruments label file, to correct the Oil Level data, in Measuring Blocks. The label file for Full VCDS is OK, but the Lite Instruments file was not.
The new Instruments file is 8Z0-920-XXX

I've also translated the HVAC label file, which was Full VCDS only, and in German language, so that it's now in English and compatible with Lite.

The new Instruments file is 8Z0-820-XXX

At the end of the HVAC label file, you'll find additional notes for some Groups and Blocks, that are included in the Full VCDS version, but which Lite does not support.
To view them just open...
  • Like
 
One coil is different from the others - had been replaced, obviously. The other three, looks like, came from the factory.
I was silly enough not to take photos of the numbers on them. šŸ¤¦ā€ā™‚ļø

Does this coil pack look good?
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