Diesel trains are powered by diesel engines that are connected to generators that then drive electrical motors which are connected to the driving wheels. Some steam engines were also outfitted to run...
Air gets into the system and it has to be removed - "bled off" is a commonly used non-technical term for that procedure - before it will start again. Most modern diesel engine fuel systems are...
For a very limited time, until you injectors clog and your fuel pump needs to be replaced. Diesel motors - turbocharged or otherwise - require extensive modification to be optimised for biodiesel....