Recently my vrs has been going like stink with the turbo whistling big time. I have now changed a leaking vacuum pipe then wow went faster.... Then I replaced the n75 valve. No hesitation or sputtering now but also I have lost the mental power. My question... Is it probably working correctly now and had overboost before and does the ecu need time to adjust to the new valve?

Did you put the same letter suffix n75 valve in?

It was a idiots mistake..

Forgot to connect electrical plug up :-) all ok now but stalling on startup occasionally