What is the normal fuel pressure for a car?

1 Answers
RyderAnn
07/24/25 8:34am
Car fuel pressure normally ranges between 300-350kPa. Fuel system classification: There are two types of automotive fuel systems: full-return systems and semi-return systems. The difference is that full-return systems have a return fuel line on the fuel rail. Gasoline source: Gasoline is a volatile, flammable hydrocarbon mixture liquid distilled and cracked from petroleum, used as fuel. It appears as a transparent liquid, is flammable, with a distillation range of 30°C to 220°C, mainly composed of C5-C12 aliphatic hydrocarbons and cycloalkanes, along with a certain amount of aromatic hydrocarbons. Idle working pressure: The reading on the fuel pressure gauge when the engine is idling is the idle working pressure of the fuel supply system, generally 0.25MPa or as specified by the vehicle's technical requirements. When testing idle working pressure, the fuel pressure should rise to 0.3MPa when the vacuum tube on the fuel pressure regulator is removed; otherwise, the fuel pressure regulator should be replaced.
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