hello greame, i think it's over boosting i went down south last week and as i went pull away from the tolls at birmingham it wouldnt pull in the top end it seems to flatten out anywhere above 3and a half thousand rev's so far i've looked at fuel pressure regulator, (which is leaking but not badly) wastegate incase it was sticking (which seemed to move freely enough) and replaced the mass air sensor (which has removed the flat spot) but nowt else, tomorow i'm going to order a waste gate mod, but i'm trying to get a better idea whats happening,
