motor bogs out uphill on 2002 Volkswagen Beetle TDI

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
sporadic problem misses under power changed fuel filter twice no help any suggestions
(1) Answer
I would check the codes, do you have a Check Engine Light coming on?
I have also replaced a few Mass Air Flow Sensors on the TDI Diesels for this issue, so be mindful of that.