Did you put a bigger turbo, stronger nozzles, stronger sensors?
We do custom remap only on turbo-diesel vehicles. Prices for custom remaps start at 300 KM, depending on the type and number of modifications, depending on the vehicle being worked on.
Only a satisfied customer ends up paying for the remap.
If the car from another car does not work as it should, the problem that you have to solve will be explained to you, you only pay the price of the diagnostics done while driving.