Misfire detection disabled vcds vagcom

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
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djbilbao
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Misfire detection disabled vcds vagcom

Post by djbilbao » Wed Dec 08, 2021 10:40 pm

hello everyone I have my misfires which are deactivated, I did not find how to reactivate them I think it is following a reprogramming because of origin I have them but once reinjecting the function does not work any more I contacted the mapper he assures me that it has not touched, I must try to drive several kilometers + 10km to see if it works again??

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Last edited by djbilbao on Tue Dec 14, 2021 11:37 pm, edited 1 time in total.

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Shoppinit
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Re: spleen ignition disable vcds vagcom

Post by Shoppinit » Thu Dec 09, 2021 9:41 am

The misfire detection is only activated in certain circumstances. If you are seeing in VCDS that misfire detection is deactivated it's because the conditions aren't right yet. I can't remember exactly what the conditions are, but it won't be activated if the engine isn't at operating temperature for example. I'll have to have a look to refresh my memory. Maybe someone else knows.

/You can modify the title of this thread to "Misfire detection disabled" or people might think it's a topic about flatulence.
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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djbilbao
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Re: spleen ignition disable vcds vagcom

Post by djbilbao » Fri Dec 10, 2021 9:28 pm

Thank you for the feedback if you have the conditions to activate the detection of misfires I am a buyer, I will modify the title when I am on the computer

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djbilbao
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Re: Misfire detection disabled vcds vagcom

Post by djbilbao » Tue Dec 14, 2021 11:38 pm

return after a few days of driving, temperature ok 90 ° C no fault, the ignition failures are still off

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Shoppinit
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Re: Misfire detection disabled vcds vagcom

Post by Shoppinit » Wed Dec 15, 2021 12:08 pm

What are you looking at? Measuring blocks 014 - 017?

How many misfires are logged for each cylinder?
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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djbilbao
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Re: Misfire detection disabled vcds vagcom

Post by djbilbao » Wed Dec 15, 2021 12:19 pm

that's it 15-16-17, no failure, and the 4th box is marked disabled, while with the original carto it is marked enabled

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Shoppinit
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Re: Misfire detection disabled vcds vagcom

Post by Shoppinit » Wed Dec 15, 2021 1:35 pm

Take the car for a drive and log groups 014 and 015 (once the engine is up to temperature) to see if at any time the detection passes from disabled to enabled.

To me, it sounds like your tuner disabled misfire detection. I don't know much about tuning, but I don't think misfire detection should be disabled, unless the tuner thought that the tune might cause misfires. :shock:
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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djbilbao
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Re: Misfire detection disabled vcds vagcom

Post by djbilbao » Wed Dec 15, 2021 1:55 pm

I'm going to connect 15/16/17 while driving to see if it moves, I checked it on the on-board instrument I can see it live with the FIS controlled but at no time did I see it working enable, I also think it can be disabled for performance sake or risk of default

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