Yes, of course.
Stock maps:
Modified (14-06-2021):
It seems to be very difficult to tune this engine, possibly because of the ecu safety features?? which I am unable to trace if there are any active when noticeable power loss is present.
Today, on the morning I thought my changes made it worse - again.
When I started again later, and started driving back to home the engine was working a lot better and fuel consumption was at some point quite good and was able to hold the speed even at 6-7l/100km momentary fuel consumption (not always tho) and around 70-80km/h was steady at 6l/100km.
About hour later, again same thing, much worse fuel economy.
Logging could be possible, but for some reason the software seems to freeze sometimes after 5-15min logging and won't work untill I start it again after waiting about 10min or more, having obd2 cable disconnected from car.
I do have quite a lot of log files, and every single log file tells the ecu follows exactly the ignition and fuel maps, so the random powerloss shouldn't be because of safety features.
Another possible reason is DISA, which is a simple vacuum and solenoid controlled flap closing and opening intake manifold section depending of rpm.
It should be closed at below 4000rpm, but my DISA has a small vacuum leak so it doesn't work.
I did "fix" it to try if there was any effect; only noticed worse fuel economy because it required more throttle.
But it failed after a short time again.
I do have a theory, that the DISA may suddenly close/open, causing odd behavior. Since the problem is it doesn't hold vacuum well enough.
Another possible reason is MAF signal is bad / incorrect randomly.