Had a stage one remap done on saturday, at a reputable company. Great power gain, feels so much quicker and responsive. However do I have a problem here...? Driving the car in 5/6th gear @ 2000rpm, I press the pedal hard to the floor, turbo starts spooling up. Clearly hear this, but then when it seems it's at peak boost, the pressure/boost let's off, for it then to start spooling back up again. I can hear this happening with the sound of the turbo and also the feel of loss of boost then it coming back on again and off and on... Does this til about 5000rpm then after that it's not happening anymore or it's not noticeable. So is this a boost leak? TIP collapsing? Or DV just releasing? Where I got car mapped said they'll gladly have a look, however if someone else has suffered from same symptoms and it's a easy fix sooner do it myself than drive the 60miles.