During start up- rough lide/misfire
Re: During start up- rough lide/misfire
That rings a vague bell. Could be that you get that DTC even when just one plays up.
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: During start up- rough lide/misfire
Do you have short desciption of how to run the lambda and airflow test and an overview of whant values to expect if ok and if there is a vacuum leak?Shoppinit wrote:
Test the air flow and lambda values, that will tell you if you have a leak.
Have you seen any checksum errors? The ABT maps are notorious for corrupting the ECU after a while.
I have not seen a checksum error.
Re: During start up- rough lide/misfire
Something is bothering me. I am pretty sure that the car doesn't listen for misfires when warming up. The misfire must be being logged when it is already warmed up.
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: During start up- rough lide/misfire
Do you know how to log stuff with the vagcom?RS6NOR wrote:Shoppinit wrote: Do you have short desciption of how to run the lambda and airflow test and an overview of whant values to expect if ok and if there is a vacuum leak?
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: During start up- rough lide/misfire
It could be. As i mention is the misfire code only popping up when i put it in drive and add trottle. I have only tried that i couple of times. So bottom line is that the misfire is not comming if i let i idle in N.Shoppinit wrote:Something is bothering me. I am pretty sure that the car doesn't listen for misfires when warming up. The misfire must be being logged when it is already warmed up.
The rough idle does not cause the rpm to fluctuate much, just a little bit (+/- 150 rpm). I have tried to add trottle when in idle just after start up and it revs up. When using a little bit of trottle the rough idle seems to go away faster. Ref. Your idea of a leakng injector... Maybe that could A path to follow. Then i am tempted to change all coils and injector since the car has been running 140k KM.
Re: During start up- rough lide/misfire
I am not an expert. I am getting help from a friend with a VAGCOM and he has been using t for some time, but he is not and expert on RS6.Shoppinit wrote:Do you know how to log stuff with the vagcom?RS6NOR wrote:Shoppinit wrote: Do you have short desciption of how to run the lambda and airflow test and an overview of whant values to expect if ok and if there is a vacuum leak?
Re: During start up- rough lide/misfire
OK. If you connect to the engine with the Vagcom, like you did to read the fault codes, then you can choose measuring blocks. Select groups 001, 002, and 032. You will see the values in the boxes. Click on log, then start and it will write all that data into a .CSV file.
Log it from cold, then drive it.
Don't reset DTC, this will zero out your trim values and you will have to drive a few km before they get learned again.
Log it from cold, then drive it.
Don't reset DTC, this will zero out your trim values and you will have to drive a few km before they get learned again.
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: During start up- rough lide/misfire
I will try to get the data logged tomorrow morning and i will post the .csv files here... Hope you could have a look at it. Thanks i advance..Shoppinit wrote:OK. If you connect to the engine with the vagcom, like you did to read the fault codes, then you can choose measuring blocks. Select groups 001, 002, and 032. You will see the values in the boxes. Click on log, then start and it will write all that data into a .CSV file.
Log it from cold, then drive it.
Don't reset DTC, this will zero out your trim values and you will have to drive a few km before they get learned again.
Re: During start up- rough lide/misfire
No probs.
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."
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Ryan_Pestell
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Re: During start up- rough lide/misfire
i would say coil packs.
Daytona RS6+ Sold 
Now Building a 500HP Lotus Exige
Now Building a 500HP Lotus Exige
Re: During start up- rough lide/misfire
is yours running ok now Ryan?
thats a few people i've heard of coil packs packing up, but its to be expected on certain cars, especially the grief they get on ours!
thats a few people i've heard of coil packs packing up, but its to be expected on certain cars, especially the grief they get on ours!
I used to own a 6, now I'm just a lurker!
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Ryan_Pestell
- 3rd Gear
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- Joined: Mon Oct 24, 2011 7:44 am
Re: During start up- rough lide/misfire
Yes running perfect now cheers.
Unsure if it's age related or tuning related, but I doubt tuners increase the dwell time on the ignition map.
So would conclude its just a mixture of heat and age, as engine mounted coils always suffer with heat dissipation, and the rs6 creates the highest amount of engine heat of any car I've owned being shoe horned into that bay
Unsure if it's age related or tuning related, but I doubt tuners increase the dwell time on the ignition map.
So would conclude its just a mixture of heat and age, as engine mounted coils always suffer with heat dissipation, and the rs6 creates the highest amount of engine heat of any car I've owned being shoe horned into that bay
Daytona RS6+ Sold
Now Building a 500HP Lotus Exige
Now Building a 500HP Lotus Exige
Re: During start up- rough lide/misfire
I have now updated the post with data from the Vagcom logging session that was conducted easiler today. The data can be found in the first post i did.
I hope the data can help you guiding me in the direction of the root cause of my problem
I hope the data can help you guiding me in the direction of the root cause of my problem
Re: During start up- rough lide/misfire
The MAF values and trim values look normal. No clues there. Probably no vacuum leak.
At least that eliminates some causes.
What are we left with?
More likely causes:
Bad injector(s)
Bad coil pack(s)
Unlikely causes:
Bad/Fake plugs
Bad fuel - has your car been off the road for a while?
N80 / Active carbon filter - might be worth testing.
ECU defect
You can test the injectors. I wonder if it's worth pulling the injectors and sending them for cleaning / testing?
I think I would be tempted to swap the coil packs out.
At least that eliminates some causes.
What are we left with?
More likely causes:
Bad injector(s)
Bad coil pack(s)
Unlikely causes:
Bad/Fake plugs
Bad fuel - has your car been off the road for a while?
N80 / Active carbon filter - might be worth testing.
ECU defect
You can test the injectors. I wonder if it's worth pulling the injectors and sending them for cleaning / testing?
I think I would be tempted to swap the coil packs out.
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."
-
Ryan_Pestell
- 3rd Gear
- Posts: 455
- Joined: Mon Oct 24, 2011 7:44 am
Re: During start up- rough lide/misfire
I still think coil or coil's and the missfire has killed the lambda's (Also quite common)
Daytona RS6+ Sold
Now Building a 500HP Lotus Exige
Now Building a 500HP Lotus Exige
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