up or down

Got a bit of a strange one, my Cupra is boosting a bit oddly on part throttle. If I accelerate using part throttle, the boost goes up to 1.5bar, then back to 0.5 and up/down/up/down then settles for part throuttle driving. It's annoying as the car surges and slows as this happens. On WOT the car...

Hello, I've just spent 20 mins searching for anything on this forum and i've seen 1 or 2 cases where the air con has made whining noises but this case is a little different! I can hear a horrible whining noise, which is quite loud and I've only noticed it recently and have not done...