I just got a 2002 A3 1.8 T, and the car runs very nice, but i noticed that when i accelerate in second or third gear, then the i can hear that the turbo does not boost for half a second, then goes back to boosting again. It does not do this in the first gear. It happens as soon as i hit 2.000 RPM, and its every time. Its not really a big deal, but it feels like i loose boost comepletely for half a second, and the car needs to build it up again. I dont really much about cars. I know that the car has just had a new MAF sensor and a bunch of new hoses and tubes, so what can it be?