2,0 TDI BPW Pumpe Düse A4 B7 rußt trotz Partikelfilter | Posts 16+

I need to correct myself. The conversion table probably only goes up to 380, which is why I entered 378 in the log, without having seen the dataset yet.

I bought the car in this condition, so there's no original file available :-/.
So, in order to improve performance, the torque limit was increased, but the soot limit was not adjusted accordingly?
How are these high torque values even achieved? 480 Nm seems far from realistic, and I doubt even the most unscrupulous tuner would program that.

These values cannot be compared to the actual torque.

Ideally, any tuner should be able to flash the software on the original device.

What exactly can be used to determine if someone has tampered with the software? Could it be that, for whatever reason, the smoking ban is being limited?

As I mentioned, in your case, the smoke limit depends on the boost pressure, and since that's not too bad, something must have been adjusted. If I have time, I'll upload the relevant maps.

Oh yeah, that's right, and also, it seems that the boost pressure is set 0.2 bar too high.

So, to summarize regarding the driving experience, I can say that...

- that in everyday driving, the performance feels like a standard model, but it's only reaching around 200 km/h on the speedometer.
- the consumption is too high.
- and emits a significant amount of black smoke, although "significant" is probably an understatement when you can already see it in your rearview mirror.

chli1976 wrote:

If I have time, I will upload the corresponding characteristic curves.

That would be nice .

Hello, with common rail diesel engines, there was sometimes a "trick" of installing a resistor before the fuel temperature sensor to make it inject more fuel. It's not really recommended to use it with a DPF, but maybe the previous owner installed something like that.

Best regards, Dago.

chli1976 wrote:

When I have time, I will upload the corresponding characteristic curves.

It's late, but it's here.

Okay, thank you. However, my knowledge is not sufficient for the interpretation of that .
By the way, I was at the chip tuner, and it seems there's some software installed.
I now have an appointment for a vote in 2 weeks.

Do you even still have a DPF installed, if it's producing that much soot?

No, that one's out. Replaced it with the Kat from the 16v model.

That brings us to the next question: the lambda sensor is no longer an option.

As far as I know, this component only has the task of controlling the AGR (Abgasrückführung) rate and doesn't influence the air-fuel mixture... is that correct?

He runs anyway, even without idling.
The symptoms mentioned, including increased fuel consumption, insufficient top speed, and excessive soot, were already present before.

MrMcFly79 wrote:

no, he's out. Replaced it with the Kat from the 16v model. That brings us to the next question: the lambda sensor is no longer an option. As far as I know,

her only task is to monitor the AGR rate, and she has no influence on the air-fuel mixture...
Hi, I'm not entirely clear on that either. I've read the documentation about it, and it's described in a very vague way there as well. Control and mixture adjustment.
Okay, so far as I understand, it's only relevant for the AGR.

Best regards, Rainer.

Hello,

With the lambda sensor, the oxygen content in the...
Exhaust emissions are measured over a wide range.
will be. In connection with diesel particulate filters...
The filter system uses the engine control unit.
Signal from the oxygen sensor for precise calculation.
the quantity and timing for the follow-up.
injection during the regeneration process. For a...
Effective regeneration of the particulate filter is a...
minimum oxygen content in the exhaust gas during a...
It requires a consistently high exhaust gas temperature.
This regulation is governed by the signal from the Lambda-…
probe in the context of the signal.
Temperature sensor located before the turbocharger.

Best regards, Dago.