How to Determine if the High-Pressure Fuel Pump is Damaged?

1 Answers
VanAva
07/30/25 6:43am
To determine if the high-pressure fuel pump is damaged, observe the following symptoms in the car: weak acceleration, severe shaking, difficulty starting, unstable idle, and in severe cases, engine stalling. Since the high-pressure fuel pump is purely mechanically driven (by the camshaft), the probability of failure is relatively low. With proper maintenance and careful usage, it can easily last over 100,000 kilometers. The fuel pump is a critical component of the fuel system. If the pump malfunctions, the fuel system cannot operate normally, leading to the car failing to start. The high-pressure fuel pump is an additional pump in direct injection engines, but unlike regular fuel pumps installed inside the fuel tank, it is typically located in the engine compartment.
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