The sudden rise in combustion pressure is a major source of diesel engine noise. By the development of the common rail high-pressure injection system and electronic fuel injection, flexible and precise control over the injection timing and amount made possible. The fuel pressure rise controlled by smoothing the combustion process by pilot injection, a method in which a small amount of fuel is injected and ignited just before the main fuel injection process. This is known as pilot injection control process.
Bleeding is the process by which air, which is present in the fuel system, is removed. Air locking in the fuel system will result in erratic running of the engine and may result in stopping of the engine. Bleeding is carried out by priming the filter. A slight loosening of the bleeding screw allows locked air to escape as bubbles along with the fuel. When locked air escapes and the system is free of air, the screw is tightened finally.
https://www.youtube.com/watch?v=44o7Jxaiu7M
https://www.youtube.com/watch?v=dXX0dW6U5YY
The fuel pump pushes petrol or diesel through the fuel lines to injectors.
The ECU uses sensors to work out right time to fire injectors and spray fuel into combustion chamber.
When the ECU activates injector, pressurised fuel is sprayed into combustion chamber through the nozzles. Because nozzles are so small, fuel is atomised, which makes it burn more efficiently.
Check Engine Light
Misfiring or Vibrating Engine
Rough Idle
Engine Stalling
Fuel Leak
Poor Fuel Economy
Failed MOT for Emissions Reasons
https://drive.google.com/drive/folders/1UEauTlf2uKDAExcX5AzwcSCO1eRMHAUG?usp=sharing