Hi all, bit of a random thread really! keep hearing a strange noise from my S2 especially when driving round town up and down the gears hard to explain really kind of like a flappy noise like carrier bacg stuck under car or something lol? also the car seems to feel down on power slightly but that could just be me imagining things

have looked over it a few times but cant see anything wrong
Thinking could it even be a burst intercooler or turbo issue or similar

hear it mostly if put foot down slowly from slow speed in 2nd or 3rd but seems to go away once get higher into the rev range and turbo is well kicked in etc, still running fine tho otherwise
Turbo seems a little delayed before kick in ?
Matt
Ps does not make the noise if stationary and rev it etc