Hesitant power??

Lads have a year 2000 Sport Wagon uk turbo 2000. At approx 40mph she feels a bit hesitant, almost like I'm dabbing the brakes. Any ideas as its a bit annoying. Have all new pads and disks on and calipers are not sticking. Its been like this since I got it a year ago but I'm now ironing some wrinkles out. Cheers for any replies lads. moticon

was just reading xxjacks post there now, I have given the car a full service with new plugs and leads also fitted, the seems to be a bit more sore on fuel at the minute as well.

vacuum leak? or MAF?