Morning all. Been a while since ive been on here & am looking for a little help again Has Anyone here seen this issue before ? I've Pretty much re-built the engine in my 2002 S3 . over the past 12 months including new Cylinder Head / Oil Pump / Turbo / Timing Belt Kit etc etc. I'm quite happy with it at the min but it does have an issue that really winds me up. This being the fact it only Boost's properly when it wants too. The boost is always there & there's plenty of it. However its delivery is erratic & often unpredictable Has anyone else had this problem & could shed some light on it Please ? Also it sometimes hangs on to its Rev's which I'm guessing is connected to the problem.