Does anyone have any idea what can cause abnormal boost surging while driving. The car runs normal and then starts to surge, some days doesnt do it others it does. But its really annoying to have the boost go up and down creating the car to accelerate on and off. PSI goes from around 16.5 down to 12 up to 16 down to 10 up to 17 down to 13. I am running Stage II with Catless DownPipe, Catless Up Pipe, MagnaFlow CBE, and COBB AP with Stage II OTS tune. Stock BPV, and Turbo, Stock intercooler, stock intake every thing else is stock. So Im just wondering is this a sign of the Turbo going bad or is it just a tune issue, or something with tune and wastegate. Thanks for any help, it would be greatly appreciated. Thanks again.