hi need some help with this one car will not start got 2 fault code (09f6 rail-pressure monitoring on engine start) & (3505 glow-plug system) on live data when cranking pre - supply pressure 4.04, pressure rail acual & specified both= Zero & actual current rail pressure control vale= 2829 mA. so 4.04 pre would be to fuel filter which is good so both pump at rear must be working? but rail pressure which comes from main pump is zero what checks can i make? or possible causes thanx