Make sure that the mesh filter screen is installed in the proper direction, since improper orientation will prevent oil supply to the turbo. (autoserviceprofessional.com)
Depending on the type of fuel valve you have you should remove the fuel valve from the fuel tank to clean or replace the tank filter screen mounted on the fuel control valve. (yourmechanic.com)
The fuel filter screens out contaminants in the fuel, and over time it will become clogged. (yourmechanic.com)