Check the glow plugs are getting switched on - use a test lamp at each of the glow plug connectors.
Check you are getting a decent voltage down to the in tank fuel pump every time.
If all is ok there, it looks like an air leak into the fuel system some where. a bit clear pipe from the filter to the FIP will check wether that is happening or not.
Check you are getting a decent voltage down to the in tank fuel pump every time.
If all is ok there, it looks like an air leak into the fuel system some where. a bit clear pipe from the filter to the FIP will check wether that is happening or not.