Okay so some of you may know i took my S3 up to leicester at RTech for a Stage 1 remap a couple weeks back. Couple long stories short it didn't end up getting mapped because they found that the car was down on power (only producing 198hp) and was significantly under boosting. A few things were ruled out (N75, actuator etc) and i was sent away with the advice of changing the MAF sensor and possibly the MAP sesnor. I'm no mechanic and only have basic knowledge of engines so this was all new to me but i ordered a new genuine MAF and fitted today in hope of a power improvement.... There was none Has anyone had this problem and may have and suggestions for me as i need this sorted before i can get it mapped RTech is a good 3hours each way for me and i don't know anyone with VAGcom to log requested boost vs actual boost to check if it's boosting correctly. Any help guys??