hi guys, i recently had problems with my rs when i turned the boost to high and the bottom boost pipe blew off and i had no boost at all, then i had metering unit problems, so took it to a rs specialist, and they told me to change metering unit and turbo, i have now done this and car starts and drives but boost comes and almost straight away the car struggles and wont go over 4k, and once it gets to 4k the boost gauge goes into the red on 1.0, any ideas, thanks