hi, still no help or advice ? this po251 code seems to be very common on the tdci diesel ford.. have replaced fuel filter,checked for loose/chaffed wiring etc. van is still cutting out with glowplug light flashing . this happens after 1/4 mile starting from cold. & under 30 mph. someone must know exactly what the problem is. maybe imv needs replaced ? awaiting replies. cheers, steve.