Hi All, In the past few months a strange problem keeps popping up with the S3. If I pull away in 1st with progressive use of the throttle (i.e. not flooring it) sometimes the car will accerlerate more quickly than pedal depression would suggest until 4k rpm, then suddenly lose all power for second (jerking the car forward slightly), and then regain power and starting accelerating again? Other points to note: - It only seems to happen in first gear - It doesn't exhibit the same behaviour if you nail it in first - It hasn't thrown any ECLs yet and I haven't seen any fault codes on previous scans (but I'm scanning it again tonight to confirm) - I have also noticed that at full throttle in 5th/6th gear you can hear a slight fluttering which almost sounds like air escpaing somewhere - On idle the revs can be very slightly lumpy (varying by 50-100rpm when warm) I originally thought it might be DV related so the OE DV has been replaced with a Forge 008p but the issue remains the same. Mods wise, its a BAM engine in standard form apart from a B5 TIP, JR filter and Customer code stage 1 map +3 degrees timing (IIRC). I'm not really clued up on things like compressor surge/stall or boost creep, but does this sound like it could be one those? If there continues to be no fault codes then my only other thoughts were maybe a split vac or boost hose? Comments appreciated!