BMW325tds. Poor power output

Hello:
My BMW 6 cyl 325tds develops very poor output between 1.000 and 2000 revs.
Above 2000 its output is good. Turbocharger and air mass meter are correct.
Does somebody have any close problem with this or similar diesel engines?
Thank you in advance for any comment

check that all intake parts are ok and clean almost sure the problem is there if not is electrical and u can finded by a scan.