Ok.Here I go.My a3 lacks power from first through to third gear.No limp mode at all.When I bought the car a month ago,there was a leak and a massive air/whooshing noise.found leak on the n/s intercooler flange,and I sorted this.hasnt improved problem at all really.powers uphill no probs now. When the car is cold,there is generally no low power and pulling off is sluggish.is this the case now I have a 6 speed?my old 1.9 awx engine could kick the **** out this car,so why going from a 1.9 to a 2.0 is worse. There is also juddering under load. Fuel economy looks about 45-50,where my awx could achieve 60-65 at best. The car used to struggle to get passed 3k revs until warm as well.now its a little better. When pulling off,the car does feel like its in limp mode in 1st and 2nd actually.no confidence in over taking,but done the off/on approach and no improvement ever. So,i changed the fuel filter today,as the old one was black and tar like.No improvement,but needs testing to see if the juddering has gone. I too have whooshing when cold when releasing throttle over 2.5k revs. I have unplugged maf sensor,and no power at all. if intercooler leak was right next to boost sensor,could this be something? HELP ME PLEASE GAV