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

1 Answers
StBrooke
07/29/25 3:58pm
Methods to detect if the high-pressure fuel pump is damaged: Connect a diagnostic scanner to the vehicle's ECU to read past or current fault codes, which can help determine if the high-pressure fuel pump is damaged. Symptoms of a damaged high-pressure fuel pump include weak acceleration, severe shaking, difficulty starting, and unstable idle. Since the high-pressure fuel pump is purely mechanically driven, the probability of failure is relatively low. With proper maintenance and careful usage, it can last over 100,000 kilometers. The fuel pump is a critical component of the fuel system. If the fuel pump malfunctions, the fuel system cannot operate properly, leading to the car failing to start. Traditional fuel-injected engines typically have only one fuel pump—the in-tank fuel pump. The high-pressure fuel pump is an additional pump found in direct-injection engines and is installed in the engine compartment.
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