right just been out and suddenly i loose all boost, put my foot down and the boost gauge goes to 0psi and the car doesnt accelerate, same in every gear? Now when its idling its erratic. the TCS light has also come up on the dash - permanently. Just done a quick vag com and it came up as 16487 Mass or Volume Air Flow Circuit - High Input? now i didnt think a kanackered MAF would make the TCS light come up and boost at 0psi?