Collected p38, put some fuel in, on m25 injector light came on, into limp mode. Got home, did all usual checks, changed in tank pump/filter. No go, starts refuses to rev. Changed no. 4 injector in case sensor gone ( known fault) no go. Shows low fuel pressure on diagnostic, bled through, same again, got 3 good injectors, known good units, do I change them out and hope that works, or look at diesel pump.