rite were do i start lol... hv got a golf gti 1.8t 20v hv been hvin abit of problem with the car have got a air leak in one off my vacum pipes and my maf sensor is on its way out so the vac com says it keeps reving and cutting out plus ive lost power but today i had my bonnet open and i was reving the car and i noticed wen i reved the car one of my fan belt pully stoped running and wen the revs got bk to normal it make a noise and started running again... dos anyone kno if this is normal thanks