Simply exchanging the MAP with a 2 BAR requires one to change many variables. But it can work. You can adjust tunerpro to display the correct units in your tables and constants to help prevent you from forgetting to scale a MAP value. Then you need to check everything that is MAP related to adjust the value back to stock or back to a reasonable number.

When MAF is in error PCM calculates MAF using primary VE table, RPM, and IAT. VE also plays a part in AE/DE. Different OS's / PCM's are biased more or less toward VE. No matter which OS, correctly tuned VE tables should be considered mandatory.