shuttering

Hey guys :) so i have a 2007 d40 yd25 vsk auto, i am encountering shuttering at 1500rpm to 2000 rpm, when the boost kicks on it goes back to normal and drives like a dream. i have done blocked egr, duplex timing chain upgrade, new head and injectors which i did myself. every thing was done...

2008 nissan navara d40 diesel Limps/splutters on deceleration Change: Fuel filter Timing Injector have been checkd All fule lines have been checked Fuel sensor Any suggestions would helps heaps