Hello,
I'm beginer in tuning ME7.5 and I can't adjust boost control correctly.

The car is Skoda Octavia with AUM 1.8t 20v engine (150hp in stock), actually equipped with: cylinder head and cams from naturally aspirated engine (ADR), K04 turbo, wastegate actuator with hard spring, MAF sensor from Audi S3 and DEKA 630cc injectors.

Problem is that actual boost is much higher than reqested, and it fluctuates. I made some modifications with LDRXN, KFLDRAPP, KFLDRL, PID options (also tried to enable LDDIMNN), but i don't get any positive effects.

My target is to get 1,2bar of boost, wastegate is set to 0,75bar (engine runs at 0,75 bar of boost when N75 DC=0).

Car was tuned before by "profesional" tuner with very bad results, below 4000rpm engine was running lambda=1 even though there was 1bar of boost, and there was also problems with fluctuating boost pressure.

Please look at my file and please help me. I can't get any good starting point to make fine tune.

Maybe you can Upload a logfile with rpm, req_boost, act_boost, wgdc.
Its easier to help if people can see what happening.

Is it original K04 or chinese K04?

First take a look what you did with your lamfa map !
reset the full lamfa area to stock and redefine map like my second screenshot!
And retry with Original PID Settings.

My Screenshot is showing only stock vs Tuned version of Spiacy, just wanted to tell that the lamfa map was not correctly assigned by Spiacy.

Thank's for explanationa of the LAMFA.

Stock PID setting worked very badly with this car.

I've alrady solved problem by limitig integral regulation via KFLDIMX, and and a little bit increasing the proportional regulation.