Passat TDI 85 kW Pump Denoise Power Loss

Hello everyone,
I'm 'new' here and find this website quite informative.
Respect!
Why I'm actually writing - I have a problem with my...
TDI Pump Düse, 115 horsepower.
The car has almost 100,000 kilometers on the odometer and is practically...
3 and a half years old. Okay, so here's my problem.
I bought the car about 3 weeks ago. Something about him...
The engine seems to be running below its full capacity and making a lot of noise.
Diesel requires (7.5 liters when driving conservatively).
I only noticed this recently, when I was with a...
I've driven other cars (with the same engine, same year of manufacture...).
Furthermore, this car was considerably quieter than mine.
I've also read that this engine generation...
experiencing issues with the injectors (wear and tear) due to the 115 horsepower.
Has anyone here had any experience with this, or is it all just 'nonsense'?
Or could the performance loss be due to something else?
Thank you very much!

Hello,

Okay, bitte gib mir den deutschen Text, den du übersetzt haben möchtest, zusammen mit dem Motorkennbuchstaben.
Have you had the error memory checked yet?
In case of performance issues, I believe a performance test (see error database) should be conducted.
With the values obtained, you usually can make further progress.

The MKB is AJM.
I haven't had the error codes read yet.
Can these types of measurement runs actually be performed with VAG-COM?
I'd like to assemble an OBD2 interface next week.

Hello,

This makes a measurement trip possible.
Please ensure that the given conditions are met.

What framework conditions?
I will try to set up the MAX232 interface and then read the error memory.

What do you think about chip tuning, considering the high mileage of this vehicle?

Hello,

Please read the article in the error database about the target values of the AJM motor. There, you will also find the framework conditions for the measurement.

A lot has already been written about chip tuning here. Just browse around...

Hi MichaelII,

Thank you for your efforts.
I will get back to you once I have read the error codes and other data from the system.

Regards,
Franz.

@Michael II

Hello Michael II,

I've finally finished my interface - big thanks to Maik.
The interface is working perfectly!
I went on a measurement trip today:

Full load 3. Revolutions; 3000 RPM (from 2500 RPM to 3500 RPM with full throttle).
accelerated - each excerpt taken at 3000 RPM.

Ad group 0:
Despite the log, no data was saved.

Ad group 4:
STAMP /min ° CF CF
18.85 2856 -19.2 18.4 0
19.3 2961 -20.5 19.4 -1.1
19.75 3066 -21.1 19.9 -1.1
20.2 3150 -21.4 20.4 -1.1

Ad group 8:
STAMP /min mg/R mg/R mg/R
17.09 2898 51.3 45.8 40.9
17.54 3003 50.8 45.6 41.2
17.99 3087 50 45.3 41.2

Ad group 10:
STAMP mg/R mbar mbar %
26.5 754.6 949 1724 100
26.96 980 949 2417 100
27.4 749.7 949 1969 100
27.85 744.8 949 1989 100
28.31 730.1 949 1969 100
28.76 730.1 949 1979 100
29.21 730.1 949 1999 100
29.66 764.4 949 2091 100
30.11 774.2 949 2162 100
30.56 744.8 949 2162 100
31.01 695.8 949 2030 100
31.46 710.5 949 2020 100

Ad group 11:
STAMP /min mbar mbar %
26.63 2982 2091 2060 62.6
27.07 3087 2091 2101 63.8
27.53 3192 2091 2060 63
27.98 3276 2091 2009 60.6

When I compare the data with the target data from the forum, then...
The following deviations were observed:
- Display group 4, field 2 is showing negative values (for the start date of the subsidy).
- Display group 8, field 4 shows values that are too low (fuel injection quantity, smoke limitation).
- Display group 10, field 1 shows values that are too low (air mass).

Can you tell me where these discrepancies originate from?
Regards,

fred.labosch

Hello,

The measured air mass is too low (it should be 850 mg/H). I have sent you a testing guide for the mass airflow sensor. Please check the following text for accuracy.

Thank you for the quick response and your guidance.

Can you tell me where the connector for the mass airflow sensor is located?

Hello,

The connector is the plug that is attached to the mass airflow sensor (MAF). The mass airflow sensor (MAF) is usually located behind the air filter housing.
One more thing: Have you checked the air filter housing and the air filter itself for any significant damage and/or contamination?

Hello Michael II,

Today, I took out and cleaned the air filter. Unfortunately, it didn't help - the readings were still just below 800. I'll go to the dealer where I bought the car this week. Let's see what he thinks about it...
It must be due to the mass airflow sensor.
I'll get back to you.
Thank you very much!

fred.labosch

Hello MichaelII,

I was at the dealership on Friday. Unfortunately, the mechanic who was working on the car was no longer at the workshop. According to the seller.
The LMM (Ladedruckmessung) was not replaced. Definitely, the car is running perfectly again - the mass airflow sensor is now providing readings around 900 mg/H.
I would like to thank you again.
Regards,

fred.labosch