RS246.com Forum :: The World's #1 Audi R, S and RS Enthusiast Community

Hi all, big fan, first post.
Amazed at the wealth of knowledge on this site, so hoping you great people can help me understand how poorly my old girl is.

Had my RS for a few years now, and pretty much had a trouble free time of it... Recently replaced suspension due to DRC, but that's just one of those items I was expecting at some point during ownership.

Last 2 cold starts I've had flashing EPC light and very rough idle.... Turn engine off and on, and this disappears and car runs fine.

Have run VCDS and looks like I've got some misfiring going on across multiple cylinders... Any ideas, or suggestions? Any other diagnostics I should run to help narrow down the issue? however being a I've cleared the codes after running the scan so will have to wait until it reoccurs.

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Address 11: Engine II Labels: 079-910-560-BNS2.lbl
Part No SW: 8E1 910 560 HW: 8E1 907 560
Component: 4.2L V8/4V FSI ª0090
Revision: --H03--- Serial number: XXXXXXXXXXXXXX
Coding: 01040003180F0160
Shop #: WSC 00664 210 87543
VCID: E3CF3155224E191

5 Faults Found:
000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 -
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 2
Mileage: 123288 km
Time Indication: 0

Freeze Frame:
RPM: 1552 /min
Load: 34.5 %
Speed: 0.0 km/h
Temperature: 6.0°C
Temperature: 9.0°C
Absolute Pres.: 990.0 mbar
Voltage: 10.668 V

000769 - Cylinder 1
P0301 - 001 - Misfire Detected - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 0
Fault Frequency: 1
Mileage: 123288 km
Time Indication: 0

Freeze Frame:
RPM: 1552 /min
Load: 34.5 %
Speed: 0.0 km/h
Temperature: 6.0°C
Temperature: 9.0°C
Absolute Pres.: 990.0 mbar
Voltage: 10.668 V

000770 - Cylinder 2
P0302 - 001 - Misfire Detected - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 0
Fault Frequency: 1
Mileage: 123288 km
Time Indication: 0

Freeze Frame:
RPM: 1552 /min
Load: 34.5 %
Speed: 0.0 km/h
Temperature: 6.0°C
Temperature: 9.0°C
Absolute Pres.: 990.0 mbar
Voltage: 10.668 V

000773 - Cylinder 5
P0305 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Mileage: 123314 km
Time Indication: 0

Freeze Frame:
RPM: 836 /min
Load: 47.0 %
Speed: 0.0 km/h
Temperature: 9.0°C
Temperature: 11.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.303 V

000776 - Cylinder 8
P0308 - 001 - Misfire Detected
Freeze Frame:
Fault Status: 01100001
Fault Priority: 0
Fault Frequency: 1
Mileage: 123314 km
Time Indication: 0

Freeze Frame:
RPM: 836 /min
Load: 47.0 %
Speed: 0.0 km/h
Temperature: 9.0°C
Temperature: 11.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.303 V

Thanks for taking the time to look!

I,ve only had my rs for 3months now so pretty new myself,theres some good lads on here that know there stuff.but im gunna stick my neck out and say it could be coils,i know they sometime cause issues like misfiring but im sure there will be someone along to give you a answer if im totally wrong.

FON.

Rule 1.

Try ringing Audi customer service to see if your cars had the product enhancement campaign 28E9. This was to upgrade the coilpacks as a number of RS4's were affected.

bam_bam wrote:FON.

Rule 1.

Thanks for the feedback thus far.... In response to Rule 1. Looks like images need to be posted as URL's, let's see if this dropbox link works:



Surrey Sam, coil pack campaign has been done... Reached out to Audi as soon as I bought her to make sure, also stamped in my service book (this and software update).

Cheers!

Then I'd start checking/testing for vac leaks and making sure that the inlet manifold core plug are all secured and present.

Thanks Surrey Sam... Ran the output tests to check flap, runners and exhaust valves and all good.... All manifold plugs are present and correct, assuming you mean the 2 x plugs on each runner? 16 in total? Is it common for these pop out?

Restarted the car several times when cold today, and all has been fine, so just seems to happen when not run for a while i.e. overnight.

Any other ideas would be appreciated.... Cold weather related somehow? condensation?
If keeps occurring, I guess coil packs / plugs are likely suspects.

Cheers again!

markshepps wrote:

bam_bam wrote:FON.

Rule 1.

Thanks for the feedback thus far.... In response to Rule 1. Looks like images need to be posted as URL's, let's see if this dropbox link works:



Surrey Sam, coil pack campaign has been done... Reached out to Audi as soon as I bought her to make sure, also stamped in my service book (this and software update).

Cheers!

Noice!

mine did this for the 1st time yesterday and ive only changed the plugs about a week ago was fine this morning odd.

A few ideas - how long sine the fuel filter was changed? How about the plugs/coils?

if its a specific cyl, you can swap the coil packs around and see if it follows, but the multiple / random sounds more like fuel / filter as a first step.

mine was running rough and had the same codes random misfires on a cold morning- I was due for a fuel filter change and after installing it - no issues since. I remember reading somewhere that our cars like fresh fuel filters. My Rs4 just turned 60k miles.

voidopolis wrote:A few ideas - how long sine the fuel filter was changed? How about the plugs/coils?

if its a specific cyl, you can swap the coil packs around and see if it follows, but the multiple / random sounds more like fuel / filter as a first step.

mine was running rough and had the same codes random misfires on a cold morning- I was due for a fuel filter change and after installing it - no issues since. I remember reading somewhere that our cars like fresh fuel filters. My Rs4 just turned 60k miles.

Thanks for the feedback voidopolis.... Issue hasn't occurred since (and she's driven daily), and no codes thrown up. Not long been serviced by my local Audi specialist, but not sure if fuel filter was replaced... I'll keep all this in mind should it start to present itself again.
Cheers!