ISUZU 2.8L 4JB1 DIESEL BOGGING DOWN, NO POWER UNDER THE LOAD | Check This First! If your ISUZU diesel bogging down, stalls under the load, check banjo bolt fitting filter screen at the lift primer pump first for any contamination. Thant’s most common cause of restricted fuel flow (fuel starvation) issue. Vehicle: Marooka MST-450 #isuzu […]