V6 Engine Idle Values

Hi,

For an A6 model year 2003 with a BDG engine, is it normal for the mass airflow sensor (MAF) value to be only 190-195 mg/H at idle with a new MAF sensor installed?
At full load and 3000 RPM, the output is then 920 mg/hour!


During the AGR test, the value went from 190 to 420 and then back down again.

It's also strange that the MWB 11 reports a target value of only 795 mbar, while the actual measured value is 999 mbar.

Or is that normal?

vagtuning wrote:

Hi, For an A6 model year 2003 with a BDG engine, is it normal for the mass airflow sensor (MAF) value to be only 190-195 mg/H at idle when using a new MAF sensor? At full load and 3000 RPM, the output is then 920 mg/hour! During the AGR test, the value went from 190 to 420 and then back down again. It's also strange that the MWB 11 reports a target value of only 795 mbar, while the actual measured value is 999 mbar. Or is that normal?

Yes, both are normal.

Here, the developers at Audi have come up with something quite special to completely confuse hobbyists trying to read out data blocks, but it's understandable why they did it. Nevertheless, the VTG (Variable Turbine Geometry) closes completely because the control system is not active at low engine speeds.

Is the BDG not already like EU4 with a throttle?

Best regards,

Hmm, I'm not sure about that off the top of my head – we'd need to look into it... but thanks for asking!