What are the manifestations of fuel pump pressure relief?

[BeauLee]

Fuel pump pressure relief can cause difficulties in ignition, engine shaking, reduced fuel supply, and negative pressure. The following are the symptoms of fuel pump pressure relief: Difficult ignition: The vehicle is hard to start. Shaking: The engine shakes. Reduced fuel supply: The manual fuel pump supplies less fuel. Negative pressure: Negative pressure appears in the fuel tank. Here are some extended details about the related content: Operation: When there is air in the diesel engine's fuel passage, such as when starting a new engine, the engine cannot start. The diesel fuel pump only works when the engine is started, and the manual fuel pump is used to pump fuel from the tank into the fuel passage. Usage: The manual fuel pump is suitable for transporting various oils, such as heavy oil, diesel, and lubricating oil. With copper gears, it can transport low internal point liquids. The various pump types of the manual fuel pump have a simple and compact structure, are easy to use and maintain, and have good self-priming properties. It is not necessary to fill the pump with liquid before each use.