we have a 2000 ford 250 diesel that will not start. the vehicle has been sitting for about 6 months now and was just brought in today. we have tested all the glow plugs and the ohmed between .5-.8 ohms so i belive that is good. we check for fuel at the filter by the gpr and it was fuel. we have also verified the correct voltage at the gpr. the batteries have also tested good. we are looking for any ideas of where to go. we are not diesel techs but we do have over 30yrs auto knowledge. any help would be great thanls.