Small Batch Matching: Find the Best Fit

Hello everyone, how long does it usually take to perform a low-volume injector nozzle balance test?
I have a Golf 6, 1.6 TDI with 66kW, which exhibits a very noticeable knocking sound in the lower RPM range.
I tried the minimalist running shoes, but my feet went numb after 30 minutes.
Please share your experiences. Best regards, Heinzi.

Hello Hheinzi, which specific engine type are you referring to? A Golf 6 with a 1.6 TDI engine producing 66 kW seems a bit underpowered.
And perhaps an automated scan for enlightenment?
hg
Herbert.

Hello, sorry I'm quite new here.

Engine type is a CAY.

Best regards,

Heinzi.

So, it's probably CAYB.
The action only makes sense if there are no other underlying issues, which is why I'm asking about the Autoscan.
Can the idle speed control (individual cylinder fuel injection deviation) be read from the engine's control unit?
If so, what are the values when the engine is cold and when it is warm?
Are the IMA values for each injector entered correctly?
Only if everything is okay, does further fine-tuning make sense; it's a matter of precise adjustments.
The procedure must, of course, be carried out with the engine at operating temperature. A duration of around 10 minutes is realistic, possibly even longer.
hg
Herbert.

Hi Herbert, thanks for the reply; I stopped after about 30 minutes; the injectors are still the original ones; the error memory is completely empty; I'll try it again tomorrow with the brake and accelerator pedal fixed in place. Best, Heinzi.

Hi Heinzi,
Have you already read about the fuel injection quantity deviation (and the IMA values)?
It is quite possible that you are trying to improve things but actually making them worse.
Happy Easter.
Herbert.

Hello everyone,
After I couldn't figure out the problem myself, I took the Golf to the VW workshop.
After a software update, everything was back to normal. The Golf now uses about half a liter less diesel and runs as smoothly as ever. Nevertheless, thank you for your help.
Best regards,
Heinzi

Thank you for the feedback!

If you have time, please also provide an Autoscan report, as that will show which software version in the engine control unit resolved your issue.

Best regards, Rainer.