the glow plugs are not working, take them out and put them across a battery, using a pice of wire from the top of the plug (treaded part)to the + pole and the side of the plug (the part thats screws into the head) to the _ side pole they should glow after 10 seconds, just check the voltage on them to make sure they are 12 volt, this is on the side of the glow plug.
c dixon, July 2009