RS6 running on 7 cylinders?

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Maurice01
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RS6 running on 7 cylinders?

Post by Maurice01 » Sat Aug 27, 2011 11:15 pm

Hello,

Since a week my car is not running smootly anymore (looks like it run on 7 cyl.). I though it were the spark plugs so I relace the with new NGK.

http://www.youtube.com/watch?v=1yVJUQ0h1AE

it shakes a little and lost some power (20%). RPM runs from 900 to 930 and back. No engine light.

I think it is one of the ignition coils but if so why don't I get an engine light? Any options?

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posterboyj
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Re: RS6 running on 7 cylinders?

Post by posterboyj » Sun Aug 28, 2011 7:07 am

Ignition coils on way out wont throw up a code until fully failed.
Audi are doing a coil recall
Cornishmoocher wrote:Buying an RS6 and then worrying about the fuel consumption is a bit like buying a boat and worrying about getting it wet.

Maurice01
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Re: RS6 running on 7 cylinders?

Post by Maurice01 » Sun Aug 28, 2011 3:04 pm

Or could it be a broken valve (inlet / outlet)?

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chunky79
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Re: RS6 running on 7 cylinders?

Post by chunky79 » Sun Aug 28, 2011 3:13 pm

Cheaper fix is coils first. Have you got Vagcom? or post your location and someone might be able to help.

dunc
previous- Pug 205 gti, 306 gti, 309 gti Goodwood.
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Gone but NEVER forgotten - C5 RS6 Misano red avant.

Now - Empty garage

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Maurice01
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Re: RS6 running on 7 cylinders?

Post by Maurice01 » Sun Aug 28, 2011 8:59 pm

Vagcom...no failures.

It seems mechanical....are there cases of broken inlet/outlet valves on RS6 C5 known?

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Shoppinit
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Re: RS6 running on 7 cylinders?

Post by Shoppinit » Tue Aug 30, 2011 9:36 am

I bet it's MAFs not seated properly.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Shoppinit
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Re: RS6 running on 7 cylinders?

Post by Shoppinit » Tue Aug 30, 2011 9:38 am

Get a Vagcom on it and start diagnosing.

Diagnosing RS6 engine problems without a Vagcom is like playing snooker in the dark, while holding the queue in your butt cheeks. Drunk.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

Maurice01
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Re: RS6 running on 7 cylinders?

Post by Maurice01 » Wed Aug 31, 2011 4:55 pm

Bought a Vagcom. No failures! :jump:

sparks plugs running well! How do I check for MAF malfunction?

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Shoppinit
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Re: RS6 running on 7 cylinders?

Post by Shoppinit » Wed Aug 31, 2011 5:09 pm

Yeah, DTCs don't tell all of the story.

Connect to the ECU and go to measuring blocks with the engine idling.

Find the MAF values in g/s for banks 1 and 2 and see what the live readings are. Should be about 3.5 - 5 for each bank.

Also find your lambda correction values (idle and partial) and post that up.

Measuring block 002 for the MAFS
Measuring block 032 for the lambda values

Check also your misfire coutner, MB014
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Daveperc
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Re: RS6 running on 7 cylinders?

Post by Daveperc » Thu Sep 01, 2011 12:43 pm

Audi are doing a coil recall
Just spoke to Rob at Camberley - recall applies to FSI engines (eg RS4) only - so no joy for us big Beasts I'm afraid.

And I've just had a third go in as many months - think I'll change the rest as they seem to be all gradually dying - still they've done over 8 years/135K miles which isn't that bad really......

Dave

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Shoppinit
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Re: RS6 running on 7 cylinders?

Post by Shoppinit » Thu Sep 01, 2011 12:58 pm

He's telling porkies or is misinformed:
Workshop campaign 28E9
Transaction No.: 2019112/10
Replacing ignition coils
Release date: 03-Mar-2011

Notes
Repair instructions
Technical background
It is possible that an ignition coil can fail to function, in which case the emissions warning lamp will light up, as designed. In some cases, the customer may also notice that the engine does not pull smoothly.

Remedy
The ignition coils must be checked on all affected vehicles and replaced if necessary.

Customer notification
Please notify customers who have taken delivery of one of the affected vehicles when the vehicles are next in the workshop.
Please ensure that all affected vehicles are checked and repaired during the next service visit. Make a note of the required campaign on the workshop order before it is signed by the customer.
If it is omitted to perform the work required for the campaign during a workshop visit, notify the customer about the campaign immediately.
You should also pass on this information to your new and used car sales departments so that the vehicles affected are checked and, if necessary, repaired immediately.

Warranty accounting instructions
Damage number:
28E9 099 002
Repair code:
Damage cause: repair operation / replacement part (AP/ET) (ignition coil)
Type of claim:
7 10 = Campaign implemented on registered vehicle
7 90 = Campaign implemented on vehicle that has not yet been registered
Note:
When making out the claim, only the applicable criterion from those listed below should be entered in the window "criterion ID".
The criteria which are displayed in the "vehicle-specific notes" but not listed here serve statistical purposes only and do not have to be entered when charging for work performed.
Only the following criteria are processing-related and should be billed.
Criterion:
See "vehicle-specific notes" (in Service Online or ELSA)
ZA = 3.6 ltr. FSI engine
ZB = 2.8 ltr. FSI engine
Z0 = 5.2 ltr. FSI engine
Z1 = 1.8 ltr. turbo MPI engine / 1.8 ltr. turbo FSI engine
Z2 = 2.0 ltr. FSI engine/2.0 ltr. turbo FSI engine/ 2.0 ltr. MPI engine
Z3 = 2.4 ltr. MPI engine
Z4 = 2.7 ltr. turbo MPI engine
Z5 = 3.0 ltr. MPI engine
Z6 = 3.2 ltr. FSI engine / 3.2 ltr. MPI engine
Z7 = 3.7 ltr. MPI engine
Z8 = 4.2 ltr. MPI engine / 4.2 ltr. FSI engine
Z9 = 6.0 ltr. MPI engine
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

MaQQu
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Re: RS6 running on 7 cylinders?

Post by MaQQu » Fri Sep 02, 2011 8:47 am

I have exactly the same symptoms in my 6 and i also suspect that one or more ignition coils are bad. There is no „Check Engine“ light though.
I asked from a local dealer here in Estonia and they asked my car's VIN code. After telling that, they informed, that the car is not in the recall list and they do not replace the ignition coils for free.

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Shoppinit
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Re: RS6 running on 7 cylinders?

Post by Shoppinit » Fri Sep 02, 2011 8:53 am

They are not hugely expensive so it won't break the bank to change them all. Best to be sure that the problem is not fueling related first.

You could always try to unplug them one by one to see if the problem gets worse or stays the same. If it gets worse then the the coil back you unplugged was good.

Difficult to know what to do. My friend had all the coil packs changed under the service campaign even though he wasnt' experiencing any problems. Shortly afterwards he developed problems with the new coil packs :bash:
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Daveperc
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Re: RS6 running on 7 cylinders?

Post by Daveperc » Wed Sep 07, 2011 10:44 am

Hi

I had all the coils replaced yeasterday as the third one had failed in about 6 weeks - after nearly 8 years and 135,000 miles they probably deserved to be retired! Also had the plugs changed at same time as there is no point in having stripped everything down and then not do them. All running beautifully now!

I quizzed a bit further re the re-call. The problems are all on the "push on" coils which are a different manufacturer and spec to the "bolt on" coils on our engines - so there is NO recall on RS6 engines.

Symptoms on failure on mine all three times were simply slightly irregular running on idle, and the amber warning light coming on. There was little detectable difference when running on load, though I tended to drive gently with the amber light on - no point in risking things. Car certainly feels very lively now, though whether that is new coils or plugs I can't say.

I think the bottom line is that many of our cars are reaching the age/mileage limit for the coils.

Dave

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