* Engine cranks but won't start: This is a classic symptom. The engine turns over, but it doesn't ignite because the fuel pump isn't delivering fuel to the engine.
* Hesitation or sputtering: The engine might run roughly, hesitate, or sputter, especially under acceleration. This indicates an inconsistent fuel supply.
* Loss of power: A weak or failing fuel pump might not be able to supply enough fuel to maintain power, especially at higher speeds or under heavy loads.
* Engine stalling: The engine might stall unexpectedly, particularly when idling or after prolonged use.
* Reduced fuel economy: A less efficient fuel pump might lead to lower gas mileage.
* Whining noise from the fuel tank: You might hear a whining or buzzing sound coming from the fuel tank area, particularly when the ignition is turned on (but the engine isn't running). This is the sound of the fuel pump working hard. This noise might not always be present, especially as the pump fails completely.
* Surging: The engine might surge or accelerate unexpectedly.
Important Note: Some of these symptoms can be caused by other issues, such as a clogged fuel filter, bad fuel injectors, or a faulty ignition system. Therefore, it's crucial to have a professional mechanic diagnose the problem to pinpoint the exact cause. Don't just assume it's the fuel pump based on symptoms alone.
