Misfire and heavy coolant loss - uh oh? only during excess demand & i am stage 2+

[reardoma]

Oh boy, probably way out of my depth here.....

Car (specs below) misfires during excess performance demands, fifth cylinder, sputters, spits out an EPC error, and will resume normal after complete shutoff.
It's been described exactly the same here (https://www.audiworld.com/forums/s4-b8-platform-discussion-134/help-please-2012-audi-s4-misfire-after-4000-rpms-vag-com-post-2889041/)
This has actually happened before to me (one misfire under heavy demand) without any lasting issue, but this trip it happened 2x...... and i somehow lost a ton of coolant (i topped it off before leaving, it was below min line 4 hrs later).

Gave it a google and many others, most also tuned and most also during extreme driving.

----
I'm going to go down the rabbit holes but wanted to post here in case the issue is obvious to anyone...... I was guessing bad intercooler or intake manifold as that appears to be the consensus among those with the above issues and coolant leak ?
----

Issues seem to be attributed to various components triggered during excess driving like-

coil packs (mine are the APR coils)
spark plugs (https://www.audiworld.com/forums/s4-b8-platform-discussion-134/help-please-2012-audi-s4-misfire-after-4000-rpms-vag-com-post-2889041/?ispreloading=1) (mine are APR iridium pros)-
PCV valve (https://www.audizine.com/forum/showthread.php/778180-If-you-have-invisible-coolant-loss?)
fuel filter?
cats shot? (https://www.audizine.com/forum/showthread.php/621982-EPC-(Electronic-Power-Control)-Light-came-on-APR-Stage-2-Sputter-Shaking/page2)

I took the car up to DC and have zero room to work with it, so at this point i'm trying to save time/money diagnosing while fighting for mechanic/garage spots, which is May 7th [o_o]

VCDS output-


01-Engine -- Status: Malfunction 1010
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: Malfunction 0010
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: Malfunction 0010
19-CAN Gateway -- Status: Malfunction 0010
22-AWD -- Status: Malfunction 0010
36-Seat Mem. Drvr -- Status: OK 0000
3C-Lane Change -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000



2 Faults Found:

6354 - Cylinder 5
P0305 00 [236] - Misfire Detected
MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 3
Mileage: 129931 km
Date: 2023.03.29
Time: 19:00:17
Engine RPM: 4872.00 /min
Normed load value: 81.6 %
Coolant temperature: 98 °C
Intake air temperature: 19 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 13.710 V
Unlearning counter according OBD: 40
Coolant temperature (unfiltered): 96.75 °C
Engine: operating status: PU
T_AST_ENVD: 899.50 s


7948 - Cylinder Disabling
P130A 00 [104] - -
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 4
Mileage: 129931 km
Date: 2023.03.29
Time: 19:00:18
Engine RPM: 4144.00 /min
Normed load value: 72.2 %
Coolant temperature: 96 °C
Intake air temperature: 21 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 13.710 V
Unlearning counter according OBD: 40
MAF_ENVD: 157.96470 mg/stroke
Coolant temperature (unfiltered): 96.75 °C


Address 03: ABS Brakes (J104) Labels:. 8K0-907-379-V2.clb
Part No SW: 8K0 907 379 CP HW: 8K0 907 379 CP
Component: ESP8 quattro H09 0020
Revision: -------- Serial number: --------------


4 Faults Found:

01324 - Control Module for All Wheel Drive (J492)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 4
Fault Frequency: 1
Reset counter: 188
Mileage: 129600 km
Time Indication: 0
Date: 2023.03.26
Time: 17:39:40
Freeze Frame:
Hex Value: 0x0000
Hex Value: 0x00A2
Hex Value: 0x000E
Hex Value: 0x508E
Hex Value: 0x0000


01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 6
Fault Frequency: 1
Reset counter: 188
Mileage: 129600 km
Time Indication: 0
Date: 2023.03.26
Time: 17:39:40
Freeze Frame:
Hex Value: 0x0000
Hex Value: 0x00A2
Hex Value: 0x0012
Hex Value: 0xB98E
Hex Value: 0x0000


00473 - Control Module for Elect. Park/Hand Brake (J540)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 1
Reset counter: 188
Mileage: 129600 km
Time Indication: 0
Date: 2023.03.26
Time: 17:39:40
Freeze Frame:
Hex Value: 0x0000
Hex Value: 0x22A2
Hex Value: 0x001A
Hex Value: 0x028E
Hex Value: 0x0000


02214 - Tire Pressure Warning
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 1
Fault Frequency: 1
Reset counter: 178
Mileage: 128903 km
Time Indication: 0
Date: 2023.03.05
Time: 16:03:56
Freeze Frame:
Hex Value: 0x1C00
Hex Value: 0x4006
Hex Value: 0x1221
Hex Value: 0x1CB6
Hex Value: 0x0000

[EuroxS4]

Misfires under heavy load are normally related to coils. I would swap coil and plug to different cylinder and clear the fault see if they come back. If they do for the same cylinder you either have a bad fuel injectors or mechanical issue. If your loosing coolant I would be checking the bore for coolant. But normaly if you have coolant getting into a cylinder it will misfire on cold start.

[reardoma]

I am concerned with the coolant leak, but will swap out the coil and plug this weekend to test the misfire- PCV will have to be a shop job if that's the issue which after reading countless threads is a problem point

[SwankPeRFection]

The EPC during heavy load at anything over 4k is either spark plugs (it won’t do it every time) or your CATs are clogged on that bank (if it does it every time). You can test for this by running the entire rev band not floored on the accelerator and basically stay out of boost. If it’s fine like that through the rev range and no EPC, it’s the CATs.

As for the coolant loss and coupling that with the misfires, it’s probably your I/C cores in the supercharger. If there’s no other coolant leak issues, those fail more often than a PCV where its internal paths for coolant have cracked. You’d notice issues with oil and coolant mixing and having other issues a lot sooner than you just noticing missing coolant. Pull the charger off and just look at the runners/dividers for each intake port. If you see any brown residue, it’s coolant and oil from blowby (normal) missing and drying up. That’s your bricks failing.

[reardoma]

The EPC during heavy load at anything over 4k is either spark plugs (it won’t do it every time) or your CATs are clogged on that bank (if it does it every time). You can test for this by running the entire rev band not floored on the accelerator and basically stay out of boost. If it’s fine like that through the rev range and no EPC, it’s the CATs.

As for the coolant loss and coupling that with the misfires, it’s probably your I/C cores in the supercharger. If there’s no other coolant leak issues, those fail more often than a PCV where its internal paths for coolant have cracked. You’d notice issues with oil and coolant mixing and having other issues a lot sooner than you just noticing missing coolant. Pull the charger off and just look at the runners/dividers for each intake port. If you see any brown residue, it’s coolant and oil from blowby (normal) missing and drying up. That’s your bricks failing.

I've got a new set of spark plugs to swap in which seems a likely culprit since the misfire only occurs during heavy boosts...

Took it to a new mechanic - am told today the PCV is dry and perfecly intact.... So mechanic's best guess is cylinder head gasket failure due to white smoke observed which smelled like burnt coolant.

Sound likely? If engine disassembly is required, should I ask for anything else done while it is out?

[SwankPeRFection]

I've got a new set of spark plugs to swap in which seems a likely culprit since the misfire only occurs during heavy boosts...

Took it to a new mechanic - am told today the PCV is dry and perfecly intact.... So mechanic's best guess is cylinder head gasket failure due to white smoke observed which smelled like burnt coolant.

Sound likely? If engine disassembly is required, should I ask for anything else done while it is out?

Head gaskets don’t just fail on these engines. Idiot mechanics overlook the intercooler bricks inside the supercharger all the time and they’ll leak and cause this issue. You need to look at the intake stacks under the supercharger and unless they are almost perfectly clean with no residue junked up, it’s the I/C bricks.

People always blaming head gasket for coolant loss and PCV or piston rings as the first problems for oil consumption. I know this second subject isn’t your issue, but oil burning and bad oil consumption with no fix for PCV is valve seals. Nobody has ever touched those in the history of this engine and keeps prodding other stuff that’s never going to fix it.

Anyway, you need to visually inspect inside the intake plenums for gunked up brown residue. It may not me all of them, usually the back cylinders get it the most because that’s where the leaks develop on the cores. Have him take pic and post them here for second opinion or go look yourself in person with the supercharger off if you know what you’re looking for.

[reardoma]

Thanks man, just requested a quote to check the intake plenums and possibly snap a photo, so I'll update this thread when i get a picture or if another direction is suggested. Tremendous help so far though, appreciate it.

[Midnight_Rider]

This is your coolant leaking. Better get it done quickly. Just look under your front engine bay to see if there are pool of coolant and oil. Need to replace some stuff.

Sent from my SM-G998U1 using Audizine Forum mobile app (http://r.tapatalk.com/byo?rid=87676)

[SwankPeRFection]

I’m sorry, but didn’t you say the mechanic told you the PCV had no issues and was fine? If that’s the case, they HAD TO take the supercharger off to look and when they do that, they can look through the bottom of the supercharger ports and see if the bricks are all junked up with brown residue. They don’t have to pull the bricks out to do that. Now if they didn’t even take the supercharger off, then they lied to you about the PCV… it’s possible they just smoke tested the intake/PCV system which won’t do much to diagnose the problem you’re having. Bet you this shop doesn’t deal much with these engines and are diagnosing to like they do most others and expect it to be correct. I’ve found that’s not always correct with these cars because they’ve got some quirky setup on them which typical mechanics haven’t run into before. Just a thought.

[SwankPeRFection]

The shop is a city shop so they don't want to disassemble the supercharger and/or engine and have it take up shop space, so their guy suggested the following:

Ryan, the diagnostician/enthusiast, suggested he could attempt to bypass the coolant going to the supercharger vs removing it. Once bypassed he can then pressure test the cooling system again and see if it holds pressure or if the level continues to drop and ends up in the cylinders. This would take the supercharger out of the equation all together as well as leaving the vehicle drive-able.

I could then have it towed to a shop outside the city that can work on it over the next week, but i'm checking in here because the suggestion above seems like if it's not the supercharger...then the result is doing further damage to the cylinders? Hope i'm wrong?.

What happened to this post? That’s what I was responding to above.

[reardoma]

Ha i deleted it thinking I'd just update the thread with the results of this bypass test.. and you're right about the PCV, which troubles me. Can you explain why a smoke test wouldn't diagnose the problem? I'll inquire if that was how they tested it. Also, if the bypass test says it isn't the supercharger, are you thinking it could still be the PCV if it was tested via the smoke test? Or would this bypass rule that out as well?

[B7S3wannabi]

A smoke test was not performed as this would not help diagnose a coolant loss issue. A coolant pressure system test was done along with using a micro camera to snake under the supercharger to inspect the PCV valve. There are no external leaks and no cross contamination of fluids. Coolant is leaking into the cylinders from either the supercharger or cylinder head gaskets.

Idiot mechanic out

[SwankPeRFection]

A smoke test was not performed as this would not help diagnose a coolant loss issue. A coolant pressure system test was done along with using a micro camera to snake under the supercharger to inspect the PCV valve. There are no external leaks and no cross contamination of fluids. Coolant is leaking into the cylinders from either the supercharger or cylinder head gaskets.

Idiot mechanic out

Lol. That explains the deleted posts. Anyway, you can pressure tests the loops as you told the customer, but honestly, that should have been done already if you didn’t want to bother with the 20 min to take the charger off and inspect the runners/cores. I guess what I’m saying is you should have presented the separate pressure tests findings (if you knew either loop could be to blame) than just jumping to the whole head gasket issues. Nothing against you, but I’ve just had too many mechanics immediately blame head gasket failure for coolant loss on these engines and they go tearing into it when the customer doesn’t know any better and the problem is still there afterwards and the shop them doesn’t want to do the right thing for them. That’s all I’m saying. Again, no disrespect towards you if you’re one of the good guys, but it’s hard to blindly trust just any mechanic when you hear the horror stories.

[B7S3wannabi]

No offense taken. I've seen and heard it all. But to answer the question about working on these motors, I used to own a 2016 SQ5 so I'd say I'm fairly knowlegable about these motors ;).

Unfortunately, my findings are not always laid out as they should be by the owner to the customer.
I pressure tested the system and used a camera to avoid removing the charger and leaving the vehicle immobile. Bypassing the system and/or removing the charger takes a little time which needs to be approved via customer before proceeding. My general diagnosis was within the initial diag fee time. Will know more once I get it back into the shop.

[JRYtheS4]

No offense taken. I've seen and heard it all. But to answer the question about working on these motors, I used to own a 2016 SQ5 so I'd say I'm fairly knowlegable about these motors ;).

Unfortunately, my findings are not always laid out as they should be by the owner to the customer.
I pressure tested the system and used a camera to avoid removing the charger and leaving the vehicle immobile. Bypassing the system and/or removing the charger takes a little time which needs to be approved via customer before proceeding. My general diagnosis was within the initial diag fee time. Will know more once I get it back into the shop.Kudos to you for coming on here and explaining. Especially since you really didn't need to prove anything. Just based on what you've said you can fix my car too lol.

Sent from my SM-G991U1 using Audizine Forum mobile app (http://r.tapatalk.com/byo?rid=87676)

[B7S3wannabi]

Kudos to you for coming on here and explaining. Especially since you really didn't need to prove anything. Just based on what you've said you can fix my car too lol.

Sent from my SM-G991U1 using Audizine Forum mobile app (http://r.tapatalk.com/byo?rid=87676)

I just think its important the customer get a clear picture, explanation, and scenarios vs playing the telephone game and someone dropping the ball leaving the customer confused or with questions.

Hell, if you want to make the trip, bring it on by, lol.

[B7S3wannabi]

And the winner is.... SwankPerfection

Drivers side intercooler brick.

[Midnight_Rider]

The heat exchange leaked inside the supercharger?

Sent from my SM-G998U1 using Audizine Forum mobile app (http://r.tapatalk.com/byo?rid=87676)

[B7S3wannabi]

The heat exchange leaked inside the supercharger?

Sent from my SM-G998U1 using Audizine Forum mobile app (http://r.tapatalk.com/byo?rid=87676)

Correct

[Midnight_Rider]

First I hear of it. How many miles on that audi?

Sent from my SM-G998U1 using Audizine Forum mobile app (http://r.tapatalk.com/byo?rid=87676)

[reardoma]

sneak a peak at my VCDS logs above and you get all kinds of goodies : Mileage: 129931 km (80k)



Going to give a shoutout to the shop too, dude came on here and spoke up (i never mentioned this thread to them) and took my confidence level from 50 to 100 aka i'm paying to have this work done bc it is done by him.

Shop details if anyone is in the area ever and needs work, the fact he PMed me with results this AM speaks for itself.


615 Independence Avenue Southeast Washington, DC 20003
License No: 42000456
Phone: (202) 543-5155
Email: [email protected]
Website: https://www.capitolhillautoservice.com

[rockstar143]

I've heard of it but PCV, water pump and thermostat is where I'd start.
To check the superchargers I recall seeing one youtube guy pulling the sc (takes about 10 minutes)
and pressurizing the bricks to see if they were leaking. I think it might be unlikely.

[SwankPeRFection]

And the winner is.... SwankPerfection

Drivers side intercooler brick.

FYI, if you get that cleared up and you still have misfire issues at full load above 4k RPM, it’s going to be your CATs… they’re starting to clog. If you change your plugs and it still does it, this is what it is, guaranteed. FYI, red Audi coils almost never fail or fail to the point of just causing misfires. A clogged CAT on any bank with cause an EPC and cylinder deactivation on that bank when running WOT to redline and it’ll misfire somewhere above 4k. Basically the exhaust can’t flow as much and causes issues with exhaust gasses not evacuating quickly enough to empty the cylinder on the exhaust stroke.

ALSO, change both bricks out at the same time! If one has failed the other will too. Reset your mileage/timer by doing both. Don’t cheap out, it’s an easy swap and they’re not that expensive anymore.



First I hear of it. How many miles on that audi?

Sent from my SM-G998U1 using Audizine Forum mobile app (http://r.tapatalk.com/byo?rid=87676)

It’s like the most common thing to cause leaks on this platform. They fail all the time. Threads from years ago detailed this a lot.

[SwankPeRFection]

I've heard of it but PCV, water pump and thermostat is where I'd start.
To check the superchargers I recall seeing one youtube guy pulling the sc (takes about 10 minutes)
and pressurizing the bricks to see if they were leaking. I think it might be unlikely.

You actually don’t even need to take the charger off to do this. Just the two small hoses that connect the front water lines to the aluminum lines that run down in front of the engine. Connect one to a pump and plug the other and pressurize the loop. Taking the charger off however allows you to get a better look at other things while you’re in there so you can prepare to get other parts if you decide to do more than just the bricks while you’re in there.

[rockstar143]

I took a direct look at mine to ensure same color and no weird coolant residue or discoloration, I had tons of coolant spray on bottom right of the engine so I assumed wp but i think it ended up being a past due pcv...i knocked it all out at once.

I get a catalyst below threshold sometimes now, bank 1 but I'm thinking that's an o2 sensor on the way out (which if upstream would account for the bad fuel economy and weird little sputter at idle unless that's hpfp related)...when it rains it pours with these cars...high output, high pain in the ass lol...200k honda problems are 100k audi problems...also, i thought maybe clogging cat but i have no issues like the ones you mention above 4k....like, none...so i doubt it. One of the main reasons I stopped at single pulley stage 2 was to NOT deal with the cats.

[SwankPeRFection]

I took a direct look at mine to ensure same color and no weird coolant residue or discoloration, I had tons of coolant spray on bottom right of the engine so I assumed wp but i think it ended up being a past due pcv...i knocked it all out at once.

I get a catalyst below threshold sometimes now, bank 1 but I'm thinking that's an o2 sensor on the way out (which if upstream would account for the bad fuel economy and weird little sputter at idle unless that's hpfp related)...when it rains it pours with these cars...high output, high pain in the ass lol...200k honda problems are 100k audi problems...also, i thought maybe clogging cat but i have no issues like the ones you mention above 4k....like, none...so i doubt it. One of the main reasons I stopped at single pulley stage 2 was to NOT deal with the cats.

Depends on which sensor. I’ve seen that code trigger if the car is also running too rich for some reason and it’ll also do it if the CAT is partially blown out. The primary sensors Sensor 1 on Bank 1 or 2 would be your widebands before the CAT. You can monitor those via VCDS and see if they’re reading close to the same. If so, they’re fine and your physical fueling (no stuck injectors or other weird shit) is fine. If there’s no other codes for the primary sensors, like heater circuit codes, then it might be a failing CAT.

On hard driven and I mean hard driven cars, it’s possible with high mileage to lose the front sensors altogether (the cage blows off) and you’ll get heater circuit codes and the sensor may still read A/F ratio to a degree (or the ECU goes into safety fueling for that bank, which is typically rich), but it needs to be replaced ASAP. In rare instances with that scenario you’ll also get a below efficiency code as well. The fronts are easy to remove if you need to just look at them by pulling them out the manifolds without disconnecting the connectors. The connectors being on the back of the engine on a stupid bracket is where the PITA is if you’re doing it the first time by feel, if you’re needing to replace the sensors entirely.

[rockstar143]

the more I read what you just wrote the more I'm really thinking I've got a failing HPFP that's dumping fuel where it shouldn't...the long crank, shit gas mileage and rich bank one made me think it might all be linked...
I'm gonna start there...I thought hitachi was the only option but apparently delphi makes one for us also...I'll report back after the swap.
Thanks for humoring me and the guidance.

[reardoma]

I always try to close threads i start, and i am by no means jumping the gun here in an attempt to jinx myself, but I may be in the clear, only time will tell -


Finally got some time this weekend to swap out the plugs. For some reason my gap tool went from 0.25 to 0.23 so i gapped them all at 0.23. When i pulled out the fifth plug, there was a bit of black gunk on it, and there was a bit above the thread which i did my best to remove prior to putting in the new plug (i replaced all 6). I had an extra coil and it was raining so i didn't even test, i just replaced the coil as well. Drove the car 15 miles home and it was a bit throaty but certainly peppier, and i will try and run it a few times and do a few pulls this week, but after a few on the way home last night i couldn't get it to fail in 5th which i did before, so maybe this is resolved......


Another recommendation for Ryan and Capitol Auto, have nothing negative to say and the job was done super fast - i ordered parts myself on Friday (owner was awesome and honest about his pricing) and they arrived the following Monday, so i got a "your job is complete" email by Tuesday noon and didn't even know the parts had shipped! I personally will probably be tossing them more business for wheels and coilovers in the future.



615 Independence Avenue Southeast Washington, DC 20003
License No: 42000456
Phone: (202) 543-5155
Email: [email protected]
Website: https://www.capitolhillautoservice.com

[reardoma]

and I am back!!!

This just gets more interesting every day.

So update: was getting misfires (but no limp mode) with the spark gap at 0.23 so went with 0.28. Thought that solved my issues because no limp mode or ecu output.

Current issue: I am messing around with 034 logging software and therefore have both 034 and VCDS outputs- i'm getting misfires on all cylinders (i think?) but other than a definitely less stable than normal idle which i'll link here, (https://youtu.be/djF5q-rlymQ) no limp mode and no ecu output, no live warnings etc.


Probably just end up taking it back to @B7S3wannabi but very curious what the log gurus think with the above info/diagnosis/fix

034 latest log:
download the 034 log here (https://file.io/gHvw6ON7EVBb)

305267
ss of errors bc for whatever reason you cannot resize the error box and i cannot see the bottom or copy/paste

VCDS Logs:


Chassis Type: FL-AU48 (8R0)
Scan: 01 03 05 08 09 15 16 17 19 22 36 3C 42 44 46 47 52 53 56 5F
62 6C 72 A9
VIN: WAUDGAFL2FAXXXX Mileage: 131180km-81511miles
01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: OK 0000
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: OK 0000
19-CAN Gateway -- Status: OK 0000
22-AWD -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
3C-Lane Change -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
56-Radio -- Status: Malfunction 0010
5F-Information Electr. -- Status: Malfunction 0010
62-Door, Rear Left -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
A9-Struct. Borne Sound -- Status: OK 0000
-------------------------------------------------------------------------------

Address 01: Engine (J623-CTUB) Labels:. 06E-907-551-CGW.clb
Part No SW: 8K5 907 551 G HW: 4G0 907 551 A
Component: 3.0l V6 TFSIH07 0007
Revision: --H07--- CVN: FBAC9B6A
Coding: 0A190034052600060000
Shop #: WSC 06208 000 00000
ASAM Dataset: EV_ECM30TFS0218K5907551G 001007
ROD: EV_ECM30TFS021_AU48.rod
VCID: 3A2D39CF8CD2F7CA01F-806E
VINID: 9D19545D159C0964401462460CF3929BA3



6 Faults Found:
7113 - Cylinder 1
P0301 00 [100] - Misfire Detected
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 131187 km
Date: 2023.05.19
Time: 15:36:01
Engine RPM: 782.00 /min
Normed load value: 18.0 %
Vehicle speed: 2 km/h
Coolant temperature: 51 °C
Intake air temperature: 45 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 768 /min
MAF_ENVD: 223.32941 mg/stroke
Coolant temperature (unfiltered): 51.75 °C
Engine: operating status: IS
T_AST_ENVD: 0.00 s
Vehicle speed: actual: 2 km/h



7119 - Cylinder 4
P0304 00 [101] - Misfire Detected
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 131187 km
Date: 2023.05.19
Time: 15:36:01
Engine RPM: 782.00 /min
Normed load value: 18.0 %
Coolant temperature: 51 °C
Intake air temperature: 45 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 768 /min
MAF_ENVD: 223.32941 mg/stroke
Coolant temperature (unfiltered): 51.75 °C
Engine: operating status: IS
T_AST_ENVD: 0.00 s
Vehicle speed: actual: 2 km/h


7117 - Cylinder 3
P0303 00 [101] - Misfire Detected
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 131187 km
Date: 2023.05.19
Time: 15:36:01
Engine RPM: 782.00 /min
Normed load value: 18.0 %
Vehicle speed: 2 km/h
Coolant temperature: 51 °C
Intake air temperature: 45 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 768 /min
MAF_ENVD: 223.32941 mg/stroke
Coolant temperature (unfiltered): 51.75 °C
Engine: operating status: IS
T_AST_ENVD: 0.00 s
Vehicle speed: actual: 2 km/h


7115 - Cylinder 2
P0302 00 [101] - Misfire Detected
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 131187 km
Date: 2023.05.19
Time: 15:36:01
Engine RPM: 782.00 /min
Normed load value: 18.0 %
Coolant temperature: 51 °C
Intake air temperature: 45 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 768 /min
MAF_ENVD: 223.32941 mg/stroke
Coolant temperature (unfiltered): 51.75 °C
Engine: operating status: IS
T_AST_ENVD: 0.00 s
Vehicle speed: actual: 2 km/h


7121 - Cylinder 5
P0305 00 [101] - Misfire Detected
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 131187 km
Date: 2023.05.19
Time: 15:36:01
Engine RPM: 782.00 /min
Normed load value: 18.0 %
Vehicle speed: 2 km/h
Coolant temperature: 51 °C
Intake air temperature: 45 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 768 /min
MAF_ENVD: 223.32941 mg/stroke
Coolant temperature (unfiltered): 51.75 °C
Engine: operating status: IS
T_AST_ENVD: 0.00 s
Vehicle speed: actual: 2 km/h


6371 - Random/Multiple Cylinder Misfire Detected
P0300 00 [101] - -
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 131187 km
Date: 2023.05.19
Time: 15:37:13
Engine RPM: 1598.00 /min
Normed load value: 18.0 %
Coolant temperature: 62 °C
Intake air temperature: 39 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.609 V
Unlearning counter according OBD: 40
Engine speed: actual: 1600 /min
MAF_ENVD: 201.54117 mg/stroke
Coolant temperature (unfiltered): 62.25 °C
Engine: operating status: PU
T_AST_ENVD: 77.10 s
Vehicle speed: actual: 24 km/h

Readiness: 1110 1101

[reardoma]

Update to the update:

Cleared out my errors with 034 finally (getting a valid connection takes forever for some reason with cable not found errors and VCDS never has an issue).

Logged while doing a short trip (15 miles) and tested when i arrived - zero errors.

Not sure i love how it now idles but if i'm not getting errors I'm not too worried about it..

Here's what is a giant 034 log file....... https://file.io/iCRYZtdmht6R

[RoofRails]

Update to the update:

Cleared out my errors with 034 finally (getting a valid connection takes forever for some reason with cable not found errors and VCDS never has an issue).

Logged while doing a short trip (15 miles) and tested when i arrived - zero errors.

Not sure i love how it now idles but if i'm not getting errors I'm not too worried about it..

Here's what is a giant 034 log file....... https://file.io/iCRYZtdmht6RA little friendly advice, if you want to get eyes on that log, you should open a datazap.me.com account. Load the log up to it (make public) and share that link. At that point, people can open it on their phone or tablet and take a look.

Don't forget to add as much useful information about your setup and the conditions you can to the log details.

Sent from my SM-S908U1 using Audizine Forum mobile app (http://r.tapatalk.com/byo?rid=87676)

[reardoma]

pretty cool, file size limitation is a bummer though but i just parsed it into 3 portions

https://datazap.me/u/reardoma/034-logs-audi-s4?log=2&data=45

[reardoma]

Well if anyone stumbles upon this thread looking for an answer... i got nothing for you.

Two sets of different spark plugs, various valve cleaners, even new coils, just random misfires I didn't have (double checking this now against prior logs) prior to a supercharger IC leak that was repaired and i'm at a loss.

Prior- cylinder 5 misfire and limp mode..

Now - random misfires on every cylinder

Actions done - Supercharger ICs replaced by shop, new spark plugs for all cylinders and one new coil installed by me. Valve cleaner run with last two refuels.

034 faults from data logger......



Starting Check Fault Codes (Read out any stored fault code from control unit)
Connected to cable: ZTF Dynamic+ Flash Cable
ECU: 8K5907551G S0007
VIN:WAUDGAFL2FA0
[ 7113 - P0301 ]
Description: Cyl.1 Misfire Detected
Symptom:
Fault State: MIL Not set for this fault, Test Failed, Pending DTC, Test failed since last clear, Test not completed this monitoring cycle
Freeze Frame:
Fault Status: 1
Fault Priority: 2
Fault Frequency: 1
Odometer: 131682 km
Date: 5/28/2023 3:11:42 AM
Engine speed: 676 RPM
OBD Load Value: 0 %
Vehicle speed: 18km/h
Engine Temperature: 59 °C
Inlet Air Temperature: 29 °C
Inlet Air Pressure: 990 mbar
Voltage: 12.593 v
OBD Unlearning Counter: 40
Engine speed- resolution 32rpm (n_32): 672 1/min
MAF with lower resolution and range (8 Bit instead of 16 Bit) (maf_envd): 212.43529 mg/stroke
measured coolant temperature (tco_raw_1): 59.25 °C
Engine operating state (state_eng): IS
T_AST with lower resolution and range (8 Bit instead of 16 Bit) (t_ast_envd): 0 s
vehicle speed (vs): 18 km/h

[ 7119 - P0304 ]
Description: Cyl.4 Misfire Detected
Symptom:
Fault State: MIL Not set for this fault, Test Failed, Pending DTC, Test failed since last clear, Test not completed this monitoring cycle
Freeze Frame:
Fault Status: 1
Fault Priority: 2
Fault Frequency: 1
Odometer: 131682 km
Date: 5/28/2023 3:11:42 AM
Engine speed: 676 RPM
OBD Load Value: 0 %
Vehicle speed: 18km/h
Engine Temperature: 59 °C
Inlet Air Temperature: 29 °C
Inlet Air Pressure: 990 mbar
Voltage: 12.593 v
OBD Unlearning Counter: 40
Engine speed- resolution 32rpm (n_32): 672 1/min
MAF with lower resolution and range (8 Bit instead of 16 Bit) (maf_envd): 212.43529 mg/stroke
measured coolant temperature (tco_raw_1): 59.25 °C
Engine operating state (state_eng): IS
T_AST with lower resolution and range (8 Bit instead of 16 Bit) (t_ast_envd): 0 s
vehicle speed (vs): 18 km/h

[ 7117 - P0303 ]
Description: Cyl.3 Misfire Detected
Symptom:
Fault State: MIL Not set for this fault, Test Failed, Pending DTC, Test failed since last clear, Test not completed this monitoring cycle
Freeze Frame:
Fault Status: 1
Fault Priority: 2
Fault Frequency: 1
Odometer: 131682 km
Date: 5/28/2023 3:11:42 AM
Engine speed: 676 RPM
OBD Load Value: 0 %
Vehicle speed: 18km/h
Engine Temperature: 59 °C
Inlet Air Temperature: 29 °C
Inlet Air Pressure: 990 mbar
Voltage: 12.593 v
OBD Unlearning Counter: 40
Engine speed- resolution 32rpm (n_32): 672 1/min
MAF with lower resolution and range (8 Bit instead of 16 Bit) (maf_envd): 212.43529 mg/stroke
measured coolant temperature (tco_raw_1): 59.25 °C
Engine operating state (state_eng): IS
T_AST with lower resolution and range (8 Bit instead of 16 Bit) (t_ast_envd): 0 s
vehicle speed (vs): 18 km/h

[ 7115 - P0302 ]
Description: Cyl.2 Misfire Detected
Symptom:
Fault State: MIL Not set for this fault, Test Failed, Pending DTC, Test failed since last clear, Test not completed this monitoring cycle
Freeze Frame:
Fault Status: 1
Fault Priority: 2
Fault Frequency: 1
Odometer: 131682 km
Date: 5/28/2023 3:11:42 AM
Engine speed: 676 RPM
OBD Load Value: 0 %
Vehicle speed: 18km/h
Engine Temperature: 59 °C
Inlet Air Temperature: 29 °C
Inlet Air Pressure: 990 mbar
Voltage: 12.593 v
OBD Unlearning Counter: 40
Engine speed- resolution 32rpm (n_32): 672 1/min
MAF with lower resolution and range (8 Bit instead of 16 Bit) (maf_envd): 212.43529 mg/stroke
measured coolant temperature (tco_raw_1): 59.25 °C
Engine operating state (state_eng): IS
T_AST with lower resolution and range (8 Bit instead of 16 Bit) (t_ast_envd): 0 s
vehicle speed (vs): 18 km/h

[ 7121 - P0305 ]
Description: Cyl.5 Misfire Detected
Symptom:
Fault State: MIL Not set for this fault, Test Failed, Pending DTC, Test failed since last clear, Test not completed this monitoring cycle
Freeze Frame:
Fault Status: 1
Fault Priority: 2
Fault Frequency: 1
Odometer: 131682 km
Date: 5/28/2023 3:11:42 AM
Engine speed: 676 RPM
OBD Load Value: 0 %
Vehicle speed: 18km/h
Engine Temperature: 59 °C
Inlet Air Temperature: 29 °C
Inlet Air Pressure: 990 mbar
Voltage: 12.593 v
OBD Unlearning Counter: 40
Engine speed- resolution 32rpm (n_32): 672 1/min
MAF with lower resolution and range (8 Bit instead of 16 Bit) (maf_envd): 212.43529 mg/stroke
measured coolant temperature (tco_raw_1): 59.25 °C
Engine operating state (state_eng): IS
T_AST with lower resolution and range (8 Bit instead of 16 Bit) (t_ast_envd): 0 s
vehicle speed (vs): 18 km/h

[ 6371 - P0300 ]
Description: Random/Multiple Cylinder Misfire Detected
Symptom:
Fault State: MIL Not set for this fault, Test Failed, Pending DTC, Test failed since last clear, Test not completed this monitoring cycle
Freeze Frame:
Fault Status: 1
Fault Priority: 2
Fault Frequency: 1
Odometer: 131682 km
Date: 5/28/2023 3:12:17 AM
Engine speed: 2314 RPM
OBD Load Value: 0 %
Vehicle speed: 67km/h
Engine Temperature: 62 °C
Inlet Air Temperature: 27 °C
Inlet Air Pressure: 990 mbar
Voltage: 13.202 v
OBD Unlearning Counter: 40
Engine speed- resolution 32rpm (n_32): 2304 1/min
MAF with lower resolution and range (8 Bit instead of 16 Bit) (maf_envd): 157.9647 mg/stroke
measured coolant temperature (tco_raw_1): 62.25 °C
Engine operating state (state_eng): PL
T_AST with lower resolution and range (8 Bit instead of 16 Bit) (t_ast_envd): 51.4 s
vehicle speed (vs): 67 km/h

Fault code check complete, found 6 faults
Done!

[RayG]

Check this video out, sounds similar to your issues.

https://youtu.be/qIbGEbod8Bs

[reardoma]

Thread update - spent a while running through the process of elimination and sequence of events and kept coming to the conclusion it had to be my error when replacing the spark plugs, nothing else makes sense...

So I pull the plugs today and reassess, and I'm 99% sure my stupidity is indeed the issue, and that I had gapped them to 0.25mm (0.01) , not 0.025 (or 0.63mm).

Won't know if this solves everything until i drive it for a while and retest for faults, but a quick cold start resulted in zero shaking while idling and smoothest I've had it run in a month, so I'm extremely hopeful. As i told @B7S3wannabi, I've never been happier to discover the solution was rooted in my own stupidity, so if anyone reads this thread and gets stuck like i did, check your math.

PS- will update in a day or two when i have a chance to drive back home and then retest for faults to close the loop.

[evanb]

Thread update - spent a while running through the process of elimination and sequence of events and kept coming to the conclusion it had to be my error when replacing the spark plugs, nothing else makes sense...

So I pull the plugs today and reassess, and I'm 99% sure my stupidity is indeed the issue, and that I had gapped them to 0.25mm (0.01) , not 0.025 (or 0.63mm).

Won't know if this solves everything until i drive it for a while and retest for faults, but a quick cold start resulted in zero shaking while idling and smoothest I've had it run in a month, so I'm extremely hopeful. As i told @B7S3wannabi, I've never been happier to discover the solution was rooted in my own stupidity, so if anyone reads this thread and gets stuck like i did, check your math.

PS- will update in a day or two when i have a chance to drive back home and then retest for faults to close the loop.306176