Hi, got a 1.5 yr old 1.4tfsi 10k miles. Over the last few weeks had an intermitant problem with acceleration, basically the cars laggy (and not turbo lag as such) when I accelerate between 2 and 4k revs the cars acceleratation is jerky and you can hear the engine reving inline with the jerks e.g. high then low engine noise. Also mpg drop by 10mpg when its being naughty. no fault lights and both times i've took it in its been fine when they've drove it... anyone any ideas??? Thanks!