walker

hi all i own a 06 reg transit connect l200 td swb 99.2bhp i have a problem with it when driving it seems to be holding back a little bit feels like turbo lag or its not boosting what it should ive drove my mates connect his is on a 05 and his pulls really well also drove 2 others 03 regs and they seem to be just as fast as my mates can anyone help was thinking of a faulty actuator on the turbo or somthing like that