Guys please help, Ive had a revo stage 1 on my gti since xmas now and never had any bother till today! It doesnt feel like its boosting near the same as it was the day i got it mapped, i drive the car everyday and havent noticed this until today. Also it used to be quite loud when u let of the throttle but again today ive noticed its alot quieter, could this be something todo with a diverter valve or summit? ive read that the o.e ones arent not really fit for a car with a remap?