right i fitted my boost gauge today and replaced a cpl of very poorly condition boost/vaccum pipes, when the engine is cold it will hold 0.5bar of boost up till nearly 6.5k then change up into second under full throttle, but once the engine is warmed up, it will hold back at full thottle(full boost) at about 4k..anyone have any ideas as its driving me crazy and my boost control valve should be here tomorrow too, and theres no point putting it on till this issue is sorted. cheers shaun