audifan
A2OC Donor
The glow plugs are not operative in current temperatures so bit of a red herring there. The engine needs diesel injected correctly, air and compression.
The fuel will never be completely bubble free as it froths as it travels from the tank but not a great deal. What is paramount is EVERY pipe and connection is completely air tight, the filter housing and drain is air tight and all the correct clamps are used. Pressurising the tank will achieve nothing unless a large split is present. The fuel line runs at negative pressure and that is what lets the smaller air particles into the fuel but does not show as a fuel leak.
The cam shaft rotates the tandem and also depresses each injector in turn, so a cam belt failure would give no injectors or tandem pump.
The injector loom could be the failure as the engine is not trying to start. You can check the resistance value of each injector on the rear of the knurled loom to head connector. It is controlled by the ECU.
Diesels run full bore air so if there is a restriction such as a rag in a pipe or the ASV in the incorrect position this would prevent running.
This brings me to compression again cam shaft or valves or piston rings although this is unlikely. Loose or missing glow plugs will also have an effect on compression.
The tandem appears to be functioning, we just do not know if fuel is in the manifold to the injectors. Very difficult to prove. If there was a restriction between the tandem and manifold this could perhaps cause the fuel to bypass and go straight to the return. This is where a fuel manifold pressure sensor would have been useful.
The fuel will never be completely bubble free as it froths as it travels from the tank but not a great deal. What is paramount is EVERY pipe and connection is completely air tight, the filter housing and drain is air tight and all the correct clamps are used. Pressurising the tank will achieve nothing unless a large split is present. The fuel line runs at negative pressure and that is what lets the smaller air particles into the fuel but does not show as a fuel leak.
The cam shaft rotates the tandem and also depresses each injector in turn, so a cam belt failure would give no injectors or tandem pump.
The injector loom could be the failure as the engine is not trying to start. You can check the resistance value of each injector on the rear of the knurled loom to head connector. It is controlled by the ECU.
Diesels run full bore air so if there is a restriction such as a rag in a pipe or the ASV in the incorrect position this would prevent running.
This brings me to compression again cam shaft or valves or piston rings although this is unlikely. Loose or missing glow plugs will also have an effect on compression.
The tandem appears to be functioning, we just do not know if fuel is in the manifold to the injectors. Very difficult to prove. If there was a restriction between the tandem and manifold this could perhaps cause the fuel to bypass and go straight to the return. This is where a fuel manifold pressure sensor would have been useful.