Hi, i have a 2003 RS6 Avant with a 512 bhp MTM upgrade and a full Milltek non-resonated exhaust.
It recently developed a misfire problem under load in cylinders 3 and 7, i had the coil packs replaced and this cured the problem.
Two days later the problem is back again this time cylinders 3 and 4, same again coil packs replaced.
Two days later guess its misfiring again. Can someone help??? Thanks
RS6 misfiring
RE: RS6 misfiring
I guess you are getting P0300/16692 along with cylinder specific errors?
16684/P0300/000768 - Random/Multiple Cylinder Misfire Detected
This DTC indicates that one or multiple cylinders are misfiring, but the ECU fails to identify the cylinder.
Possible Causes
Possible Solutions
Cylinder x Misfire Detected (e.g.)
16692 p0308 035 cyl 8
16691 p0307 035 cyl 7
16687 p0303 035 cyl 3
16686 p0302 035 cyl 2
Possible Causes
16684/P0300/000768 - Random/Multiple Cylinder Misfire Detected
This DTC indicates that one or multiple cylinders are misfiring, but the ECU fails to identify the cylinder.
Possible Causes
- Air Intake System leaking
Fuel Supply faulty
Injector(s) faulty
Ignition Cable(s) and/or Spark Plug(s) faulty
Ignition Coil(s) faulty
Exhaust Gas Recirculation (EGR) Valve (N18 stuck/open
Camshaft Position Sensor (G40) faulty
Possible Solutions
- Check Misfire Recognition
Check Air Intake System
Check Fuel Supply
Check Injector(s) and Injector Sealing
Check Ignition Cable(s) and Spark Plug(s)
Check Ignition Coil(s)
Check Exhaust Gas Recirculation (EGR) Valve (N18
Check Camshaft Position Sensor (G40)
Cylinder x Misfire Detected (e.g.)
16692 p0308 035 cyl 8
16691 p0307 035 cyl 7
16687 p0303 035 cyl 3
16686 p0302 035 cyl 2
Possible Causes
- Ignition system
Fuel injectors
Fuel pressure
Running out of fuel
EVAP canister purge valve
Evaporative emission system
Low compression
Base engine problems
Controle Module damaged
RE: RS6 misfiring
What fuel are you running? Have you tried filling up somewhere else?
When's the last time the plugs were changed?
+What Grant said - especially vacuum + MAF leaks.
When's the last time the plugs were changed?
+What Grant said - especially vacuum + MAF leaks.
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."
///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."
RE: RS6 misfiring
Would be useful if you could log the ignition timing to see if it's being pulled by the ECU. Also MAF values.
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."
///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."
I was told that you should always change the spark plugs when doing the coil packs otherwise the packs will fail quickly again
previous- Pug 205 gti, 306 gti, 309 gti Goodwood.
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
why?
Why??chunky79 wrote:I was told that you should always change the spark plugs when doing the coil packs otherwise the packs will fail quickly again
I'm interested in this as I've just changed a single coil in the wifes X3 yesterday.I assume is due to the faulty coil not making a full/ proper connection with the spark plug. Spark plugs are pretty delicate
previous- Pug 205 gti, 306 gti, 309 gti Goodwood.
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
Audi S3, S4 V8 avant.
Porsche Macan Turbo.
Gone but NEVER forgotten - C5 RS6 Misano red avant.
Now - Empty garage
If you don't know where you're going, any road will take you there!
Hi Guys, Thanks for all your replies, i had the car diagnised again and its the original cylinders 3 and 7 misfiring again. I will go with the spark plugs for now although they were changed less than 500 miles ago. The plugs were laser platinums, main dealer supplied with chasis number reference. Could it be the MTM ECU remap playing up?
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