Originally Posted by SortaSUNK

Go for a drive, watch the boost gauge. See if it is Spiking. A lot of tuning programs have boost cut to stop the car from causing damage. However, you say it's breaking up so it may be your map sensor just saying fuck off to the boost and doesn't know what to do with itself. So, go out, retest and come back. If it is spiking, you may want to look into that.