So.... what was the final verdict? Did you solve the fuel consumption issue?
So many interesting threads on here, with such a wealth of experience and generous input - many hours of conversations and investigations - then they just cut off dead! No conclusion, no resolution, no update. I don't really understand why - isn't it etiquette on here? Otherwise, very friendly forum.
I'm sorry to leave you hanging.
No, it didn't go back to normal.
I've got orings and copper washers changed on injector thingies (not sure what the proper English name) and nothing changed. They said it would be good to change spray nozzles as a whole or just spraying part, but that's really expensive, so I've left it at that.
They also adjusted ignition delay, promising that it would liven up the car and slightly reduce fuel consumption, but it did just the opposite. I can't convince them that they are at fault here, as ignition is "less then a degree away from ideal" (they checked it with VagCom). I can't confirm nor deny it as I don't know where to look in VCDS.
After all this operation my start-stop doesn't start the car anymore (just clicks). Starting manually works ok. I've paid to service my starter too, turns on faster with key, but still not on eco after stopping ):
Now my turbochager acts up (can be a big part of my mpg), G38 gives implausible signal sometimes (left me almost stranded once) and steering angle sensor turns off abs and esp (adaptation helps for 100km or so).
So I've got a lot on my plate with this car. 6L/100km if driving calmly is acceptable for now.
I think I need to scratch together some cash and find 3L specialist to look at it. Local mechanics are just no knowledgeable enough or I haven't found the one.
Thank you all again! Sorry to disappoint.