Mitsubishi L200 2002 K74 Turbo Diesel.

Mitsubishi L200 2002

Hello to every dear mechanic and thank you for this website.
I have a performance problem with my diesel truck its just barely accelerates when out of the turbo zone like 2000 rpm.There really is no power at all and i can hear the Injector lift pump making noise when the engine is idling could you help me out?
Thank you.

I am going to go ahead and publish this in the hopes that someone that has come across this issue before may chime in with some insight.