Misfiring on S6 C6

A6 All/ S6 All
#1

Membership,

I am new to the website but could really use some help with our high mileage S6 C6 4F. We purchased the car knowing it was going to need yet another carbon clean, as it had the typical rough idle at cold start, but hopeful a good cleaning would get it back into shape. Within the first couple weeks of driving it the oil leak (or river) started showing up by the pool on the driveway and smoke rolling out from the coating on the exhaust pipes (previous owner likely put a new belly pan on it to hide them). Anyways, we read some of the forums, watched a few youtube videos, and pulled the car into the garage, ready to dig in…

after taking the intake off we found the oil had filled all of the channels on the top of the engine and was running out the front holes and down the front. From reading these forums we knew the oil adapter was likely the issue, so we replaced these O-rings, and carbon cleaned the intakes. We thought about doing the injectors but since the car had so many miles we thought maybe they had been done before…yeah right, keep reading :slight_smile: The car ran better once we had it back together but the oil kept running, and misfires were still there when cold (but better). So, we read some more, and pulled it back into the garage for round 2.

Back in it went, this time with the intent to replace the injectors (since the spark plugs and solenoids looked brand new from when we took them out the first time to fix the valve cover gasket leaks, and turn the engine over). We replaced all the injectors and the 4 VVT solenoid Orings (learned that these were issues, too, after Round1). They were extremely hardened - likely due to all the heat-soaking. As well, we replaced the front main seal while we had the car in front-end service mode (thank you forum!). Anyway, this leads us to today…and the misfires continue to get worse - maybe due to more fuel getting into the cylinders, now?

On a positive note, I do think most of oil leaks are taken care of…but only time will tell. We are now seeing cylinders 1,2,5,6, and 10 showing misfire codes (in VCDS Engine II)…and the car is actually running a lot worse than it ever has. Even though the plugs and coils looked new, I swapped 7&8 and 1&2 to see if the misfire moved…unfortunately, they didn’t.

So, I am to the point of doing a compression check (yes, probably should have done this before spending any time or money on this high mileage car)…lesson learned. Anyway, my son and I have had a good time wrenching on this beast together but would love to drive it instead of only work on it :slight_smile: I was wondering is there anything else we should be checking? We verified the fuel rail pressure is correct, and there are no other codes (that relate to engine performance). I forgot to mention that when we had the intake off during Round1 we actually inspected the flappers (and to our surprise) they were all fully functional, so we didn’t have to do a replacement or flapper delete. I would appreciate any thoughts the membership has on if there is anything beyond the compression check we can still investigate. Here is the output from VCDS (but I am a newbie using this tool, too, so any guidance on what else to check would be much appreciated!

Wednesday,30,August,2023,22:58:00:10909
VCDS – Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 23.3.1.0 (x64) HEX-V2 CB: 0.4631.4
Data version: 20230421 DS346.2

Mileage: 326520km-202890mi Repair Order:

Chassis Type: 4F (4L0)
Scan: 01 02 03 05 07 08 09 0E 0F 11 31 15 16 17 19 36 37 42 46 47
4F 52 53 55 56 61 62 67 6C 72 76 77

VIN: WAUGN74F77N050167 Mileage: 326520km-202890miles

00-Steering Angle Sensor – Status: OK 0000
01-Engine – Status: Malfunction 0010
02-Auto Trans – Status: OK 0000
03-ABS Brakes – Status: OK 0000
05-Acc/Start Auth. – Status: OK 0000
07-Control Head – Status: OK 0000
08-Auto HVAC – Status: OK 0000
09-Cent. Elect. – Status: OK 0000
0E-Media Player 1 – Status: OK 0000
0F-Digital Radio – Status: OK 0000
11-Engine II – Status: Malfunction 0010
31-Engine other – 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
36-Seat Mem. Drvr – Status: OK 0000
37-Navigation – Status: OK 0000
42-Door Elect, Driver – Status: OK 0000
46-Central Conv. – Status: Malfunction 0010
47-Sound System – Status: OK 0000
4F-Centr. Electr. II – Status: OK 0000
52-Door Elect, Pass. – Status: OK 0000
53-Parking Brake – Status: OK 0000
55-Headlight Range – Status: OK 0000
56-Radio – Status: OK 0000
61-Battery Regul. – Status: OK 0000
62-Door, Rear Left – Status: OK 0000
67-Voice Control – Status: OK 0000
6C-Back-up Cam. – Status: OK 0000
72-Door, Rear Right – Status: OK 0000
76-Park Assist – Status: OK 0000
77-Telephone – Status: OK 0000

Address 01: Engine Labels:. 07L-910-552-BSM1.clb
Part No SW: 4F1 910 552 A HW: 4F1 907 552
Component: 5.2L V10/4V FSI ª0040
Revision: 59H09— Serial number:
Coding: 01050009190F0160
Shop #: WSC 08213 444 69273
VCID: 221DFBDA08CD58CA39F-8076
VINID: 9D19577871161C77801400461CD7F03136

2 Faults Found:
005495 - Right Engine Mount Solenoid Valve (N145)
P1577 - 004 - Open Circuit
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326528 km
Time Indication: 0
Date: 2023.08.30
Time: 22:52:30

         Freeze Frame:
                RPM: 310 /min
                Load: 54.5 %
                Speed: 0.0 km/h
                Temperature: 73.0°C
                Temperature: 33.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 10.922 V

006435 - Please Check DTC Memory of ECU Number 2
P1923 - 008 -
Freeze Frame:
Fault Status: 01101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326528 km
Time Indication: 0
Date: 2023.08.30
Time: 22:52:46

         Freeze Frame:
                RPM: 596 /min
                Load: 31.8 %
                Speed: 0.0 km/h
                Temperature: 72.0°C
                Temperature: 31.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.208 V

Readiness: 0110 1101

Address 02: Auto Trans Labels: 09E-927-156.lbl
Part No SW: 4F2 910 156 M HW: 09E 927 156 C
Component: AG6 09E 5,2 FSI USA 0020
Revision: --H01— Serial number: 0092046
Coding: 0000002
Shop #: WSC 02335 785 00200
VCID: 2F3B02EE4B1FE5A2A61-807A

No fault code found.

Address 11: Engine II Labels:. 07L-910-552-BSM2.clb
Part No SW: 4F1 910 552 A HW: 4F1 907 552
Component: 5.2L V10/4V FSI ª0040
Revision: 59H09— Serial number:
Coding: 01050009190F0160
Shop #: WSC 08213 444 69273
VCID: 221DFBDA08CD58CA39F-8076

6 Faults Found:
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 -
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326528 km
Time Indication: 0
Date: 2023.08.30
Time: 22:52:44

         Freeze Frame:
                RPM: 698 /min
                Load: 31.4 %
                Speed: 0.0 km/h
                Temperature: 72.0°C
                Temperature: 31.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.081 V

000769 - Cylinder 1
P0301 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326528 km
Time Indication: 0
Date: 2023.08.30
Time: 22:52:44

         Freeze Frame:
                RPM: 698 /min
                Load: 31.4 %
                Speed: 0.0 km/h
                Temperature: 72.0°C
                Temperature: 31.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.081 V

000770 - Cylinder 2
P0302 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326528 km
Time Indication: 0
Date: 2023.08.30
Time: 22:52:44

         Freeze Frame:
                RPM: 698 /min
                Load: 31.4 %
                Speed: 0.0 km/h
                Temperature: 72.0°C
                Temperature: 31.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.081 V

000774 - Cylinder 6
P0306 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326528 km
Time Indication: 0
Date: 2023.08.30
Time: 22:53:06

         Freeze Frame:
                RPM: 687 /min
                Load: 32.1 %
                Speed: 0.0 km/h
                Temperature: 71.0°C
                Temperature: 30.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.716 V

000773 - Cylinder 5
P0305 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326528 km
Time Indication: 0
Date: 2023.08.30
Time: 22:53:06

         Freeze Frame:
                RPM: 687 /min
                Load: 32.1 %
                Speed: 0.0 km/h
                Temperature: 71.0°C
                Temperature: 30.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.716 V

000784 - Cylinder 10
P0310 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326528 km
Time Indication: 0
Date: 2023.08.30
Time: 22:53:06

         Freeze Frame:
                RPM: 687 /min
                Load: 32.1 %
                Speed: 0.0 km/h
                Temperature: 71.0°C
                Temperature: 30.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 12.954 V

Address 46: Central Conv. Labels:. 4F0-910-289.lbl
Part No SW: 4F0 910 289 G HW: 4F0 907 289 G
Component: Komfortgeraet H22 0170
Revision: 01700022 Serial number: 01018896230000
Coding: 4619293
Shop #: WSC 02335 785 00200
VCID: 2E051FEA4C15ECAAAD7-807A

Subsystem 1 - Part No: 1K0 951 605 C
Component: LIN BACKUP HORN H03 1301

1 Fault Found:
01134 - Alarm Horn (H12)
012 - Electrical Fault in Circuit
Freeze Frame:
Fault Status: 01101100
Fault Priority: 3
Fault Frequency: 254
Reset counter: 165
Mileage: 200540 km
Time Indication: 0
Date: 2017.11.10
Time: 20:23:48

End----------(Elapsed Time: 01:56, VBatt start/end: 13.6V/13.8V)-----------

#2

Hi, I would look for a vacuum leak and check compressions now. Plus check the fuel pressure using VCDS.

#3

Will do…we did use silicone red on both sides of the intake manifold and the throttle body interface gaskets (thanks again to all the forum comments!) but there may be others…or we left one of the many hoses off? Are there any known areas to concentrate on for the vac leak…also looks like the short term trim values were maxed at 25 so this may point to too much air, correct? The fuel pressures were correct the last time we checked (before Round2) but will check them again…I will have to look up the group number again. Are the full list of s6 c6 group numbers for vcds listed somewhere on the forum?

#4

Hi Ted,

I edited your first post to help you and others read it. I also cleaned up your Vag reading to help make it faster for other members to look at it. If you wish for this to be put back we can do that. I have some basic abilities to help edit posts.

With that. If your fuel trims are way out of line. then You 100% should start with a Smoke test of the intake track with all of the hoses. The V10 is not kind to vac leaks and max fuel trims tend to signal there is a leak. A smoke test is a good way.

You have shown the misfires but they all seem to be at idle. Cold start after a lot of work you’ll see this. This is generally from the fuel trims getting set to 0. Cold start and warm up can take a while to set. You’ll want to take the car for a drive keep at a constant RPM then see how the missfires look or see if they are gone.

Injectors are a big deal and can make up for a large amount of the missfires. But vac leaks will make up even more. So I’d look for a good smoke machine and start there.

2 Likes
#5

If you use VCDS or even a cheap Bluetooth OBD adapter with the Torque app or similar, check your battery voltage on cold start. I have seen some threads where a battery replaced solved the cold miss issues, and I believe I have that issue myself right now. My voltage is pretty low on cold start and takes a while to get back above 13v. On warm starts the voltage stays above 13v and I don’t have any miss.

#6

I thought the rough idle at cold start was due to the SAI system, because it stops at exactly one minute or whenever the SAI pump turns off. Mine does that too, and it’s a healthy car as far as I know - no fault codes and it has new spark plugs, coils, injectors and a carbon clean done.

#7

I know there’s a TSB about how the car runs/sounds a little different on cold start but I’m pretty sure mine is certainly missing. When I pull out of my driveway and try to go it sputters a bit. I’ll have to look into the SAI to be sure, but I noticed it always happens when voltage is low. Subsequent starts throughout the day (even after cooling down) seen fine. Been meaning to check the date on my battery and just replace it if it’s getting old.

#8

Good thread. I am interested in what you find out is causing the misfires: vac leak, bad battery, something else?? I hope its something easy to fix.

#10

So the saga continues with the S6…we left off needing to check compression and smoke test. We first completed the compression check, only did cylinders 1,2,6,and 7 (front ones that are easy to pull without removing all the air tubes) - and because 1,2,&6 were all missing, and causing misfire codes. Cylinder 7 has never caused a misfire code…to compare to. The results were 120-135psi with cylinder 6 being the highest. Cylinder 7 (no misfires) was in the middle of the range. I think cylinder 1 was the lowest. I know I am supposed to have all adjacent plugs removed, so maybe only 1 and 6 are valid numbers, but I was ok with the data, because 6 was the highest, and has been causing the misfire codes.

Since the compression test, I went ahead and ordered maintenance items (PCV valve and fuel filter) and installed these, as well.

I will use VCDS to test fuel pressures, again, but the last time they were fine at idle, but will need to do some load tests/graphs to see what happens as the injectors start opening up more.

I did receive the smoke machine so I hooked it to the front port of the IM and used plastic bags with tight rubber bands around the throttle body inputs - this seemed to work well. I started the smoke machine and after a while very small amounts of smoke showed up at the interface of the throttle bodies to the Y adapter, and between the seam of the IM halves. One question, how much smoke is too much for this car? Since the regulator puts out 1psi from the smoke machine, is this much higher than the max vac when the car is at ideal…seems like it would be, but not sure. I went ahead and pulled the throttle bodies and covered the gasket with red silicone and put them back together, and their leaks were more significant than the IM halves seam. I really don’t want to pull this IM for the 4th time, but if everyone feels that no amount of smoke is OK, I will dive back in (and kick myself for not splitting it before - even though all the flappers were visually working fine).

On a positive note I think I have most of my oil leaks stopped. I replaced the Oring and the custom double Oring on the adapter the first time I had the IM off, the second time I had the IM off I did the VVT solenoid orings and front main seal (the top of the engine was completely wet again), and the third time it was completely dry on top! The pool of oil on the driveway has now been reduced to the size of a pee, which I think is residual from the engine being completely covered in oil from those listed above. I held off on the oil cooler Oring, under the alternator, for a warm day when I have nothing else to do but work on the S6 in the sun, and drink a beer :slight_smile: It didn’t appear to be leaking, and I want to put all my efforts on this misfire to get this thing back on the road!

Thanks for the input, everyone!

#11

To do a comprehensive smoke test, you have to include all intake piping from the mafs to the throttle bodies as well.

A lot of air intake leaks are found in the connections between the pvc and the intake pipe.

#12

Awesome, thanks SO much. I will put the bag between the S pipe and the MAF and try again tonight! I used a tube connecting the two ports on the passenger S pipe before.

#13

Any feedback on if ANY smoke is ok at an IM halves interface? Since I was seeing a small amount between the IM halves at front, will these small leaks cause a misfire? Eng92, you said the connection between the pvc and the intake pipe, is this referring to the plastic S pipe (made of pvc plastic) and the aluminum nose of the throttle body?

#14

I completed the more comprehensive smoke test and it showed some slight leaking from the lower of the two ports on the right S tube. This was solved by pressing in the connector a little further but it looks like I will need to replace it, or have a new Oring installed (if it is replaceable).

Other than that, the smoke test only showed a little leakage around the IM halves seam. I did check voltage, and the battery was at 12.5 volts, so I put a charger on it all night. I started it this morning and still missing, but maybe not as badly. Have others observed 12.5 volts from the battery causing misfires?

I will be monitoring fuel supply tonight.

#15

I checked fuel supply pressure but only saw one value, can I use a different channel for Bank1 and Bank2, one for each rail? The pressure varied from 30-40 bar as a reved the engine so it seems to respond properly.

I checked the lambda value in chanenl 107 and it showed Bank1 at 0% and Bank2 at 25%, so seems to be an issue with Bank2, but misfires are on both banks, so seems odd to me.

lambda

I am posting VCDS report below for holding the car at roughly 1800rpm while parked and a second one a little above idle 1k…second one had a new code that I haven’t seen before related to the fuel pump circuit intermittent. Is it odd that the cylinders that are misfiring are only on the front (1,2,6) and the back (5,10) of the engine?

Thursday,14,September,2023,23:51:28:10909
VCDS – Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 23.3.1.0 (x64) HEX-V2 CB: 0.4631.4
Data version: 20230421 DS346.2

Chassis Type: 4F (4L0)
Scan: 01 02 03 05 07 08 09 0E 0F 11 31 15 16 17 19 36 37 42 46 47
4F 52 53 55 56 61 62 67 6C 72 76 77

VIN: WAUGN74F77N050167 Mileage: 326700km-203001miles

01-Engine – Status: Malfunction 0010
03-ABS Brakes – Status: Malfunction 0010
07-Control Head – Status: Malfunction 0010
08-Auto HVAC – Status: Malfunction 0010
11-Engine II – Status: Malfunction 0010
31-Engine other – Status: Malfunction 0010
46-Central Conv. – Status: Malfunction 0010

Address 01: Engine Labels:. 07L-910-552-BSM1.clb
Part No SW: 4F1 910 552 A HW: 4F1 907 552
Component: 5.2L V10/4V FSI ª0040
Revision: 59H09— Serial number:
Coding: 01050009190F0160
Shop #: WSC 08213 444 69273
VCID: 221DFBDA08CD58CA39F-8076
VINID: 9D19577871161C77801400461CD7F03136

2 Faults Found:
005495 - Right Engine Mount Solenoid Valve (N145)
P1577 - 004 - Open Circuit
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:35:42

         Freeze Frame:
                RPM: 130 /min
                Load: 62.3 %
                Speed: 0.0 km/h
                Temperature: 47.0°C
                Temperature: 42.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 10.414 V

006435 - Please Check DTC Memory of ECU Number 2
P1923 - 008 -
Freeze Frame:
Fault Status: 01101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:35:56

         Freeze Frame:
                RPM: 1246 /min
                Load: 22.3 %
                Speed: 0.0 km/h
                Temperature: 46.0°C
                Temperature: 38.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.208 V

Readiness: 0110 1101

Address 03: ABS Brakes Labels: 4F0-910-517.clb
Part No SW: 4F0 910 517 P HW: 4F0 614 517 P
Component: ESP 8.0 quattro H05 0070
Revision: 00000000 Serial number: 00000000000000
Coding: 0020920
Shop #: WSC 02335 785 00200
VCID: 313F04965D2BF352B05-8064

2 Faults Found:
01314 - Engine Control Module
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 3
Fault Frequency: 1
Reset counter: 205
Mileage: 326528 km
Time Indication: 0
Date: 2023.09.07
Time: 19:56:48

         Freeze Frame:
                Hex Value: 0x0000
                Hex Value: 0x6282
                Hex Value: 0x0025
                Hex Value: 0x0194
                Hex Value: 0x00FF

01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 3
Fault Frequency: 1
Reset counter: 206
Mileage: 326556 km
Time Indication: 0
Date: 2006.03.15
Time: 12:11:38

         Freeze Frame:
                Hex Value: 0x00C0
                Hex Value: 0x4282
                Hex Value: 0x0024
                Hex Value: 0x0192
                Hex Value: 0x00FF

Address 08: Auto HVAC Labels: 4F0-910-043.clb
Part No SW: 4F0 910 043 HW: 4F1 820 043 AC
Component: KLIMABETAETIGUNGH20 0170
Revision: 00000031 Serial number: 00000000306922
Coding: 0536618
Shop #: WSC 02335 785 00200
VCID: 5BE3863E6F2729023A9-800E

1 Fault Found:
01273 - Fresh Air Blower (V2)
009 - Open or Short to Ground - Intermittent
Freeze Frame:
Fault Status: 00101001
Fault Priority: 3
Fault Frequency: 1
Reset counter: 208
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.16
Time: 01:23:39

         Freeze Frame:
                Temperature: 23.0°C
                Speed: 0.0 km/h
                (no units): 23.0
                (no units): 221.0

Address 11: Engine II Labels:. 07L-910-552-BSM2.clb
Part No SW: 4F1 910 552 A HW: 4F1 907 552
Component: 5.2L V10/4V FSI ª0040
Revision: 59H09— Serial number:
Coding: 01050009190F0160
Shop #: WSC 08213 444 69273
VCID: 221DFBDA08CD58CA39F-8076

6 Faults Found:
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 -
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:35:54

         Freeze Frame:
                RPM: 661 /min
                Load: 31.4 %
                Speed: 0.0 km/h
                Temperature: 47.0°C
                Temperature: 38.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.208 V

000769 - Cylinder 1
P0301 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:35:54

         Freeze Frame:
                RPM: 661 /min
                Load: 31.4 %
                Speed: 0.0 km/h
                Temperature: 47.0°C
                Temperature: 38.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.208 V

000770 - Cylinder 2
P0302 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:35:54

         Freeze Frame:
                RPM: 661 /min
                Load: 31.4 %
                Speed: 0.0 km/h
                Temperature: 47.0°C
                Temperature: 38.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.208 V

000774 - Cylinder 6
P0306 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:36:28

         Freeze Frame:
                RPM: 2047 /min
                Load: 20.4 %
                Speed: 0.0 km/h
                Temperature: 48.0°C
                Temperature: 36.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.462 V

000773 - Cylinder 5
P0305 - 008 - Misfire Detected
Freeze Frame:
Fault Status: 01101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:36:28

         Freeze Frame:
                RPM: 2047 /min
                Load: 20.4 %
                Speed: 0.0 km/h
                Temperature: 48.0°C
                Temperature: 36.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.462 V

000784 - Cylinder 10
P0310 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:36:28

         Freeze Frame:
                RPM: 2047 /min
                Load: 20.4 %
                Speed: 0.0 km/h
                Temperature: 48.0°C
                Temperature: 36.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.462 V

End----------(Elapsed Time: 02:03, VBatt start/end: 14.1V/14.1V)-----------

Second Report at Idle

Thursday,14,September,2023,23:29:01:10909
VCDS – Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 23.3.1.0 (x64) HEX-V2 CB: 0.4631.4
Data version: 20230421 DS346.2

VIN: License Plate: 14SEPT23

            Address 31: Engine other       Labels: REDIR FAIL!

Control Module Part Number: 4F1 910 552 A HW: 4F1 907 552
Component and/or Version: 5.2L V10/4V FSI ª0040
Software Coding: 01050009190F0160
Work Shop Code: WSC 08213 444 69273
Additional Info: 4F1910552A 5.2L V10/4V FSI ª0040
VCID: 221DFBDA08CD58CA39F-8076
Address 01: 4 Faults Found:
005495 - Right Engine Mount Solenoid Valve (N145)
P1577 - 004 - Open Circuit
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.19
Time: 12:54:02

         Freeze Frame:
                RPM: 477 /min
                Load: 67.4 %
                Speed: 0.0 km/h
                Temperature: 21.0°C
                Temperature: 23.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 11.049 V

012425 - Signal Line for Fuel Pump Electronics
P3089 - 002 - Electrical Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.19
Time: 22:39:03

         Freeze Frame:
                RPM: 176 /min
                Load: 65.9 %
                Speed: 0.0 km/h
                Temperature: 26.0°C
                Temperature: 28.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 10.414 V

008567 - Bank 1; System Too Lean off Idle
P2177 - 001 - - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326686 km
Time Indication: 0
Date: 2006.03.21
Time: 21:36:57

         Freeze Frame:
                RPM: 1563 /min
                Load: 40.8 %
                Speed: 18.0 km/h
                Temperature: 96.0°C
                Temperature: 30.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.843 V

006435 - Please Check DTC Memory of ECU Number 2
P1923 - 008 -
Freeze Frame:
Fault Status: 01101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326707 km
Time Indication: 0
Date: 2006.03.22
Time: 03:19:52

         Freeze Frame:
                RPM: 0 /min
                Load: 0.0 %
                Speed: 0.0 km/h
                Temperature: 50.0°C
                Temperature: 45.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 11.938 V

Address 11: 6 Faults Found:
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.19
Time: 12:54:15

         Freeze Frame:
                RPM: 805 /min
                Load: 52.5 %
                Speed: 0.0 km/h
                Temperature: 21.0°C
                Temperature: 22.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 12.573 V

000769 - Cylinder 1
P0301 - 001 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.19
Time: 12:54:15

         Freeze Frame:
                RPM: 805 /min
                Load: 52.5 %
                Speed: 0.0 km/h
                Temperature: 21.0°C
                Temperature: 22.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 12.573 V

000770 - Cylinder 2
P0302 - 001 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.19
Time: 12:54:15

         Freeze Frame:
                RPM: 805 /min
                Load: 52.5 %
                Speed: 0.0 km/h
                Temperature: 21.0°C
                Temperature: 22.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 12.573 V

000773 - Cylinder 5
P0305 - 008 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.19
Time: 12:55:01

         Freeze Frame:
                RPM: 1110 /min
                Load: 41.9 %
                Speed: 12.0 km/h
                Temperature: 29.0°C
                Temperature: 21.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.589 V

000784 - Cylinder 10
P0310 - 001 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.19
Time: 12:55:01

         Freeze Frame:
                RPM: 1110 /min
                Load: 41.9 %
                Speed: 12.0 km/h
                Temperature: 29.0°C
                Temperature: 21.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.589 V

000774 - Cylinder 6
P0306 - 001 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 326664 km
Time Indication: 0
Date: 2006.03.19
Time: 12:55:42

         Freeze Frame:
                RPM: 886 /min
                Load: 31.0 %
                Speed: 2.0 km/h
                Temperature: 36.0°C
                Temperature: 21.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.716 V

Ted

#16

What is odd to me is the P2177 code says Bank1 too lean off idle but the Lambda values show Bank2 at 25%. Based on the misfires being on both sides maybe there are different issues on each bank, with both of them being lean? I will do more investigation on measures to see if I can see anything odd with the MAF values and the pressures between the two banks.

I also notice that the fault P3089 shows a voltage of 10.414V, so not sure what happened there. I charged the battery and it was up at 13+ volts but after a start, and a short rest, it was at 12.35V. I would expect the car to work well with a battery above the rated 12V, but maybe not? Should the battery be changed even though its voltage is over 12V at start and the car turns over quickly?

Ted

#17

Update for today…
Spent some more time with the S6, and VCDS, last night. Checked the MAFs through all the ranges and both Bank1 and Bank2 were agreeing, and values are in the normal ranges, so this one is checked off the list, again.

I reveiwed the lambda values at cold start, and two of them were at 25%, and after reaching normal operating temperature - see pic below they had settled but one was at 3.4%

G032_idle_warm

Is the 25% due to cat warm up, and intentional?

I was a bit shocked to see that the cooland temp was at 105C…no wonder this thing runs so HOT
It looks like the spec on the thermostat is 221F (105C)…do they make a 90C version, is there any issue with going lower?)

I checked fuel rail pressure in 01 Engine module but wasn’t able to see both Bank1 and Bank2 fuel rails at the same time. Do I need to change the measure group number to see both banks or do I need to go to Engine Other to see both on different channels?
I may have found a couple issues. The first one is the pressure at idle was running at 30bar, and the spec calls for 35-45 bar, so looks like at least one of the pumps is running weak, likely both. THe other issue is notices is that after the engine got to op. temp., I turned the car off, and then powered VCDS back on to group 106, and the fuel pressure, which is supposed to go up to 60bar due to heat soak, did nothing but drop. Here is the vidoe I watched to see how to do the test: https://www.youtube.com/watch?v=k50Z5JLfuJs
What does this mean? Is this just another indicator of a bad HP fuel pump(s) or could this be a regulator problem, and can I test for their individual performance some how?

I did do output testing in VCDS to check and make sure all the EGR and EVAP solenoids were firing and properly shutting off air flow (by blowing through them while they were being cycled). This output test only seems to run Bank1…but I didn’t see the same options in Engine Other module, how do I test devices on both banks? Can anyone point me to where to run output tests on Bank2 devices in VCDS?

Thanks for the help members!
Ted

#18

Use Engine II module for the other bank.

There is only one HP fuel sensor. The rails are plumbed in series.

#19

I am getting misfires only from cyclinders (1&2,5,6,10) which are at the ends of the fuel rails…so does this align with fuel pressure issues?

#20

According to the diagram from the user manual the stage1 pump (in the tank) is plumbed to a distribution block with the pressure switch on the back right of the engine. From there, two pipes run to each of the HP fuel pumps. Each fuel pump has one high pressure line that goes to each rear-end of the fuel rails, right HPFP goes to right rail, and left HPFP goes to left rail. From there, the rails look like they have a high pressure (120bar) bleed off valve that combine under the IM, and goes back to the inlet pipe area. There is also a line that ties the right and left rails together toward the front (so they are in fluid communication with one another - likely to equalize the pressure in each rail so all the cylinders have similar fills for the same open time). This makes sense to me but I don’t understand how the HP sender, that is threaded into the front of the block, gets the pressure from the rails?? Anybody know how this works? Sounds like I have to replace both pumps to get this pressure back up to spec, correct? Where are the best places to buy good quality pumps for reasonable prices?

Fuel Pressure Sender G247
Fuel Pressure Sender G2471545×475 182 KB

#21

The best thing to do. Is to check the fuel trims over all 4 banks. You have bank 1 - This is passenger side 123 - Then bank 2 - passenger side 45

This should all be shown in ECU 1
Then in ECU 2 bank 3 (but depending on ECU and year this might just be bank 1 again and then bank two for 456 - 78

Lean off idle. Is this what we’re still chasing?