Hi Pin, I followed your advice and connected my VAF through the converter.
Here you will find 2 screenshots of the software connected to the converter (I made the engine run from idle to 5000 rpm. I didn't made any roadtest but have the feeling the engine runs already smoother - the AFR gauge I have on the dashboard shows a more tuned mix, as the original setup seems to be very often lean) :
- conversion table :
https://www.dropbox.com/s/33mcx8w8cz...00.20.png?dl=0
- log graph :
https://www.dropbox.com/s/26ssrz0l9y...01.38.png?dl=0
Here you will find the log :
https://www.dropbox.com/s/rly0kfx0ln...01_20.log?dl=0
and here the tab :
https://www.dropbox.com/s/po2c56zpl5...01_17.tab?dl=0
Now I'll try to fit the MAF, I bought the Siemens you recommend because I couldn't find the diagrams for the Passat one I already had.