Strong Indicators of a Bad Fuel Pump:
* No-Start Condition: This is the most obvious sign. The car cranks but won't start because the fuel pump isn't delivering fuel to the engine.
* Engine Stalling/Hesitation: The engine might sputter, hesitate, or even stall, especially under acceleration or when the fuel tank is low. This suggests the pump isn't supplying enough fuel under demand.
* Weak Fuel Pressure: A mechanic can measure the fuel pressure. Low pressure is a direct indicator of a failing fuel pump. This requires specialized tools.
* Whining Noise from the Fuel Tank: You might hear a humming or whining sound coming from the fuel tank area, particularly when the ignition is turned on (before cranking). This is the sound of the fuel pump working hard, often a precursor to complete failure. This is less common as pumps often fail suddenly.
Less Direct Indicators (Could be other issues):
* Reduced Fuel Economy: While this can be caused by many things, a weak fuel pump can contribute to lower gas mileage.
* Hard Starting (especially when hot): Sometimes, a failing pump might struggle to deliver enough fuel when the engine is hot.
* Surging/Rough Idle: In some cases, a partially failing pump might cause inconsistent fuel delivery, resulting in a rough idle or surging.
Important Considerations:
* Fuel Filter: A clogged fuel filter can mimic the symptoms of a bad fuel pump. Replacing the fuel filter is a cheap and easy first step in troubleshooting.
* Relay: The fuel pump relay is an electrical component that switches the pump on and off. A faulty relay can prevent the pump from working even if the pump itself is fine.
* Wiring: Problems with the wiring to the fuel pump can also prevent it from functioning.
* Fuel Pump Module: On some models, the fuel pump is integrated into a fuel pump module, which can fail as a whole unit. This is more than just the pump itself.
How to Diagnose (basic steps, professional help recommended):
1. Check the fuel filter: This is the easiest and cheapest check.
2. Listen for the fuel pump prime: Turn the ignition key to the "ON" position (don't crank the engine). You should hear a brief humming sound from the fuel tank area. If you don't hear it, the pump or its relay may be bad.
3. Check fuel pressure (professional help recommended): A mechanic uses a fuel pressure gauge to measure the pressure. This is crucial for definitive diagnosis.
4. Visual Inspection (professional help recommended): Inspecting the fuel pump itself often requires dropping the fuel tank, which is a somewhat involved process best left to a professional unless you're experienced with car repair.
In short: If your Sebring won't start, or exhibits stalling/hesitation alongside a whining noise from the fuel tank, a bad fuel pump is highly probable. However, it's always best to have a qualified mechanic diagnose the problem properly before replacing the fuel pump. Replacing the fuel pump is a significant repair job.
