Suzuki Club UK

Hi All, i have a 2008 Vitara 1.9ddis. The issue im having is that i have to start it with easy start and if the revs fall below1800 then the car stalls out. Initially it showed the fuel rail pressure sensor and i changed that but still the same issue. Would anyone have any ideas?
Many Thanks In Advance

Have you tried the simple things like fitting a new fuel filter?

Could also be a faulty pump or fuel pressure regulator at a guess?

Tbh I’m not familiar with the diesel engines or later model Suzukis but that’s where I would start.