Audi A6 Engine Problems: Lack of Power?

Hello everyone,

After reading a lot, I still don't really understand the vehicle. So, here are the problems I'm having:

Acceleration from 0 to 100 km/h is too slow (approximately 8.5 seconds).
It becomes very difficult above 220 km/h.
Exhaust fumes inside the car (not always, only when the car is stationary).
It's emitting smoke from the engine compartment during the regeneration process.
Warm air coming from the passenger side (problem solved).


During several logging trips, I've observed that the air mass drops off starting around 3000 RPM. The boost pressure is normal, and the fuel injection volume remains constant.

When accelerating from a standstill, it feels like it takes forever for it to build up power and start moving. The turbocharger builds boost, but I'm not sure if that's normal, and whether it's supposed to be stronger at higher RPMs or if it should actually accelerate faster.

The Audi has modified software. It should have around 280 horsepower.

Mileage: approximately 270,000 km; Transmission: Tiptronic.

Attached are screenshots of the log files.

I'm uploading the files. Feel free to take a look if you're interested.

Edit:

LMM is new (replaced as a precaution).
Air filter replacement.
Fuel filter, new.

Okay, before I look at the logs.
Exhaust fumes inside the car, smoke coming from the engine compartment... have you inspected the exhaust manifold, gaskets, and connections for the turbocharger, EGR system, and exhaust? Before you try to interpret any data from the diagnostic readings, make sure everything is mechanically sound.

Exhaust fumes inside the car are also a serious issue. While driving, enough air flows through the engine compartment, but when the car is stationary, the ventilation system can draw exhaust fumes in. Please identify and fix the source of the problem first. Since this has been happening for a while, there should be visible signs of the issue.

Hi,

That is now moving very much in the direction of diagnostic support.
I'd be happy to assist you with your customer status or support key.
We are an official distributor, just like Auto-Intern, where you purchased your VCDS. It should be understandable that we do not want to provide diagnostic support for their customers.

See registration:
/profile.php?mode=register

With support key, please:
https://shop.dieselschrauber.org/en/obd-support-key-p-112.php

Best regards, Rainer.