Another Misfiring RS4...

[kmurph]

I'll try to keep it short...

Took the car into the dealer, and had the following performed:

Oil/filter change
Serpentine belt replaced
fuel filter replaced
tranny fluid replaced
brake/slave cylinder fluid flushed
Torque mount replaced (034)
Coolant flush

I picked the car up on a Friday, and the first thing I noticed was that there was a moaning noise that fluctuated along with engine rpms, and appears to be coming from the right front side of the car.. I decided to drive it and see if it went away.

On Monday, the car threw a CEL on startup after work. I drove home, and then to the dealer...didn't make it - the car started misfiring while in stop and go traffic, and the engine shut down. I could not get it started again, so had it flatbedded. The Dealer had it for several days, and said it started up with no issues. They ran diagnostics while driving, and all readings were normal. They also said they could not hear the moaning noise.

I picked the car up and have driven probably 1k miles with two recent incidents where the car started to misfire and shutdown while (again) in stop and go traffic - but this time there were no CELs. Car eventually started back up and drove with no issues.

One other symptom I have noticed is that engine braking is not nearly as noticeable...I get off the gas, and the car does not decelerate nearly as much as before. This seems to be even more pronounced immediately after the two recent incidents - and the moaning seemed to be louder as well.



CELs from the first incident were:

3 Faults Found:
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 008 - - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

000776 - Cylinder 8
P0308 - 001 - Misfire Detected - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

000774 - Cylinder 6
P0306 - 008 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

Any ideas? This is my second RS4,so I'm pretty familiar with and have experienced many issues...(mostly Intake Manifold related), but this is different. The car was carbon cleaned adn the plugs were replaced at 25K miles, and it now has 64K. Coils were also replaced for the recall. Oil temp is also higher than normal, even after changing the oil. I routinely see 230+ while in stop and go trafific, which was rare in the past. Any thoughts would be appreciated...

[Seattle squash]

I'll try to keep it short...

Took the car into the dealer, and had the following performed:

Oil/filter change
Serpentine belt replaced
fuel filter replaced
tranny fluid replaced
brake/slave cylinder fluid flushed
Torque mount replaced (034)
Coolant flush

I picked the car up on a Friday, and the first thing I noticed was that there was a moaning noise that fluctuated along with engine rpms, and appears to be coming from the right front side of the car.. I decided to drive it and see if it went away.

On Monday, the car threw a CEL on startup after work. I drove home, and then to the dealer...didn't make it - the car started misfiring while in stop and go traffic, and the engine shut down. I could not get it started again, so had it flatbedded. The Dealer had it for several days, and said it started up with no issues. They ran diagnostics while driving, and all readings were normal. They also said they could not hear the moaning noise.

I picked the car up and have driven probably 1k miles with two recent incidents where the car started to misfire and shutdown while (again) in stop and go traffic - but this time there were no CELs. Car eventually started back up and drove with no issues.

One other symptom I have noticed is that engine braking is not nearly as noticeable...I get off the gas, and the car does not decelerate nearly as much as before. This seems to be even more pronounced immediately after the two recent incidents - and the moaning seemed to be louder as well.



CELs from the first incident were:

3 Faults Found:
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 008 - - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

000776 - Cylinder 8
P0308 - 001 - Misfire Detected - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

000774 - Cylinder 6
P0306 - 008 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

Any ideas? This is my second RS4,so I'm pretty familiar with and have experienced many issues...(mostly Intake Manifold related), but this is different. The car was carbon cleaned adn the plugs were replaced at 25K miles, and it now has 64K. Coils were also replaced for the recall. Oil temp is also higher than normal, even after changing the oil. I routinely see 230+ while in stop and go trafific, which was rare in the past. Any thoughts would be appreciated...

My misfires have usually been carbon, injector or coils. The moaning sounds like it could be slightly miss aligning fans/covers which causes noise if they rub. The fit is tight as you know and I had a shop one time remove bumper again and redo for the reason of the moaning sound/rubbing. Good luck, sorry to hear.

[your daddy]

the engine decell is probably normal. just not as noticeable engine clunking from the new torque mount. and you have greatly exceeded the carbon clean interval in my opinion.

[S42RS4]

Do you have access to VAG com cable? If you do check your short and long fuel trim. If I recall correctly you don't want to be over 5% but I could be wrong. I replace all my 8 Injectors and coil pack and that got rid of my mis-fires. I hope this link will steer you in the right direction.

Here is the link for more info. http://www.audizine.com/forum/showth...or-Maintenance

[FWP!]

Injectors

[b6bydesign04]

One other symptom I have noticed is that engine braking is not nearly as noticeable...I get off the gas, and the car does not decelerate nearly as much as before. This seems to be even more pronounced immediately after the two recent incidents - and the moaning seemed to be louder as well.

Slightly OT, but is the noticeable engine braking something others have experienced with this car? The engine decel when I let off the gas is much more pronounced than any other previous car I've ever owned.

[Kai@EliteMS]

Plugs, Coils, Fuel filter (you already did), Carbon Build Up, Injector, if one of those don't help compression test.

[ven0m]

Plugs, Coils, Fuel filter (you already did), Carbon Build Up, Injector, if one of those don't help compression test.

x2

[kmurph]

I did plugs over the weekend, and I do have a vag com, so I will do some diagnostics. I know a carbon clean is due...the previous owner did it at 25k miles. My dealer quoted my $2200.00, which is $1K too high IMO, and the few local shops I've asked aren't interested...

[Seattle squash]

I did plugs over the weekend, and I do have a vag com, so I will do some diagnostics. I know a carbon clean is due...the previous owner did it at 25k miles. My dealer quoted my $2200.00, which is $1K too high IMO, and the few local shops I've asked aren't interested...

Yeah that's steep, the last one I did was $799. And the highest was $1200 but that was also the shop who said; "wow what is this car?" However, they did a good job - 4 days later. Shop it and make sure they done it a lot and it wont be so bad.

[Jake@JHM]

We charge $660 for an RS4 carbon cleaning.


Be have been seeing injector failures becoming ever more common with FSI engines. They are getting to the point not where they are starting to show more often.

[Seattle squash]

We charge $660 for an RS4 carbon cleaning.


Be have been seeing injector failures becoming ever more common with FSI engines. They are getting to the point not where they are starting to show more often.

Like jake said, injectors are crucial and I was the victim of a failed one "open" but was very lucky after locking up the engine and no damage. Thanks Jake for the all new injectors - runs like a dream and smoother/stronger powerband! Ciao.

[mattshaver]

Moaning could be power steering. A dealer put brake fluid in my power steering system and it's been moaning ever since. Could also be serpentine belt tensioner rubbing on something from dealer not aligning things right.

[Jake@JHM]

Like jake said, injectors are crucial and I was the victim of a failed one "open" but was very lucky after locking up the engine and no damage. Thanks Jake for the all new injectors - runs like a dream and smoother/stronger powerband! Ciao.

No problem! I am glad you are up and running smoothly again!

[iparatroop]

Um, misfires are either air, fuel or spark. You have multiple vacuum lines that could cause your misfire issues. With your mileage and the number of heat cycles those cheap plastic lines have been through, I'd start there. Almost sounds like an evap line, but that should throw a code.


Sent from my iPhone using Audizine mobile app

[B 26 VAM]

I'll try to keep it short...

Took the car into the dealer, and had the following performed:

Oil/filter change
Serpentine belt replaced
fuel filter replaced
tranny fluid replaced
brake/slave cylinder fluid flushed
Torque mount replaced (034)
Coolant flush

I picked the car up on a Friday, and the first thing I noticed was that there was a moaning noise that fluctuated along with engine rpms, and appears to be coming from the right front side of the car.. I decided to drive it and see if it went away.

On Monday, the car threw a CEL on startup after work. I drove home, and then to the dealer...didn't make it - the car started misfiring while in stop and go traffic, and the engine shut down. I could not get it started again, so had it flatbedded. The Dealer had it for several days, and said it started up with no issues. They ran diagnostics while driving, and all readings were normal. They also said they could not hear the moaning noise.

I picked the car up and have driven probably 1k miles with two recent incidents where the car started to misfire and shutdown while (again) in stop and go traffic - but this time there were no CELs. Car eventually started back up and drove with no issues.

One other symptom I have noticed is that engine braking is not nearly as noticeable...I get off the gas, and the car does not decelerate nearly as much as before. This seems to be even more pronounced immediately after the two recent incidents - and the moaning seemed to be louder as well.



CELs from the first incident were:

3 Faults Found:
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 008 - - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

000776 - Cylinder 8
P0308 - 001 - Misfire Detected - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

000774 - Cylinder 6
P0306 - 008 - Misfire Detected - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 100074 km
Time Indication: 0

Freeze Frame:
RPM: 1306 /min
Load: 38.0 %
Speed: 0.0 km/h
Temperature: 24.0°C
Temperature: 26.0°C
Absolute Pres.: 970.0 mbar
Voltage: 13.716 V

Any ideas? This is my second RS4,so I'm pretty familiar with and have experienced many issues...(mostly Intake Manifold related), but this is different. The car was carbon cleaned adn the plugs were replaced at 25K miles, and it now has 64K. Coils were also replaced for the recall. Oil temp is also higher than normal, even after changing the oil. I routinely see 230+ while in stop and go trafific, which was rare in the past. Any thoughts would be appreciated...

Hello!
I have same problem with my RS4.
How you end with this?
Thanks!

[B 26 VAM]

I also have this on VCDS

[zhaniaudi]

Moaning could be power steering. A dealer put brake fluid in my power steering system and it's been moaning ever since.

I think this has happened to me as well during my last service a couple of weeks ago. I assume in your case it was done in error? Did they take responsibility for the issue and fix it? I have a high pitched moaning noise that seems to be linked to turning the steering wheel (pitch changes as I turn).

[zhaniaudi]

I have misfires also: P0300, P0305, P0306, P303 and P301. This started happening after my 65k service and an intake throttle body fuel injector service. Is there a definitive solution to this problem? I don't want to be driving down the highway and suddenly have the engine fail on me.

[MugelloB7RS4]

Theres no such thing as a definitive solution to misfires because they could be caused by many things. Since you have multiple on both banks, my guess would be the engine needs a carbon clean or theres an air leak somewhere. The chances if having 4 coils or 4 plugs go south at the same time are slim. Your most likely scenario is probably carbon clean. If you do go that route do injectors at the same time. However I'm just speculating. If you aren't comfortable doing the work yourself, have a shop diagnose it.

[Avus RS4]

Check your air filter box and throttle body hose/connector.
It could be that by performing the scheduled work that one or more items may have been left loose or disconnected (Check all the electronic plugs first before you dive into more expensive items)

[zhaniaudi]

Theres no such thing as a definitive solution to misfires because they could be caused by many things. Since you have multiple on both banks, my guess would be the engine needs a carbon clean or theres an air leak somewhere. The chances if having 4 coils or 4 plugs go south at the same time are slim. Your most likely scenario is probably carbon clean. If you do go that route do injectors at the same time. However I'm just speculating. If you aren't comfortable doing the work yourself, have a shop diagnose it.

Thanks. Carbon clean is due in the next 5k miles so I'll have the shop look at the injectors at the same time. I cleared the misfire codes and they haven't come back (yet).

[kmurph]

A quick update to the thread I started in 2016...like many have said, misfires can be caused by a number of issues. In my case, the engine did misfire once, shut down and threw a CEL, but from that point on it would just shut down gracefully at idle while in stop and go traffic. The dealer could not diagnose the issue because every time the car shut down, no CEL was present. I only had the CEL on the initial misfire. The car appeared to run fine for a while...even had the shop foreman take the car home for several days to see if he noticed anything.

The stalling came back randomly, and I eventually got another code referencing the fuel pressure sensor. I replaced the HP fuel sensor and didn't have any fuel delivery issues for a while, but within the next several months, a HPFP failed, so I replaced both and have been good ever since...

[CORNISHB8]

A quick update to the thread I started in 2016...like many have said, misfires can be caused by a number of issues. In my case, the engine did misfire once, shut down and threw a CEL, but from that point on it would just shut down gracefully at idle while in stop and go traffic. The dealer could not diagnose the issue because every time the car shut down, no CEL was present. I only had the CEL on the initial misfire. The car appeared to run fine for a while...even had the shop foreman take the car home for several days to see if he noticed anything.

The stalling came back randomly, and I eventually got another code referencing the fuel pressure sensor. I replaced the HP fuel sensor and didn't have any fuel delivery issues for a while, but within the next several months, a HPFP failed, so I replaced both and have been good ever since...

Did the whine sound you were experiencing go as soon as you replaced the sensor or not until you replaced the pumps?

I have a rough idle, no power, whining sound and oil temp higher than normal

[RAudi Driver]

Noob, this thread is dead. Its' 3 years old!

[CORNISHB8]

I know but the originator is still active on the forum and may be able to help!!

[RAudi Driver]

True, but most of these guys moved on to other platforms. Facebook for one. I don't have Facebook so can't follow them.