1. Verify the Fuel Pump Isn't Running:
* Listen Carefully: Have someone turn the ignition key to the "ON" position (without cranking the engine). You should hear a brief whirring sound from the fuel pump in the back of the car, usually near the fuel tank. If you don't hear it *at all*, that's strong evidence the pump is the problem. This whirring is only for a few seconds, so listen closely.
* Check the Fuel Pump Relay (If you're comfortable with this): The fuel pump relay is an electrical component that switches the power to the pump. Its location varies by year and model, so consult your owner's manual or an online repair manual for your specific vehicle. You can try swapping the relay with a similar one (check the amperage rating!) to see if that fixes the problem. A bad relay will prevent the pump from running.
2. Check the Fuel Pressure (More Advanced):
* This requires a fuel pressure gauge: You'll need a special gauge that screws onto the fuel rail (the metal bar with fuel injectors). Consult a repair manual for the location and how to safely connect the gauge.
* Turn the ignition key to "ON": The gauge should show the fuel pressure. If it's zero or very low, the pump is likely the problem. There are specified pressure ranges for your engine; check your repair manual.
* Caution: Fuel is highly flammable. Be extremely careful when working around it.
3. Other Potential Issues (Less Likely if you're not hearing the pump):
* Low Fuel: Sounds obvious, but make sure you actually have fuel in the tank.
* Clogged Fuel Filter: A severely clogged filter can restrict fuel flow. It's relatively inexpensive to replace.
* Bad Fuel Pump Relay: As mentioned above.
* Wiring Issues: A broken wire or bad connection in the fuel pump circuit can prevent the pump from receiving power. This is more involved to diagnose.
* Fuel Pump Control Module (PCM): In some cases, a faulty PCM might not be sending the signal to activate the fuel pump. This requires diagnostic tools.
* Immobilizer System: Some vehicles have an anti-theft system that prevents starting if the key isn't recognized.
What to Do Now:
* Start with the simple checks: Listen for the fuel pump's whirring sound when the ignition is turned on. If it's absent, the pump is the most likely suspect.
* If you hear the pump but still no start: Proceed to the fuel pressure test (if you have a gauge) or consider getting it checked by a mechanic. They have the tools to properly diagnose the problem.
* If you are not comfortable doing the checks yourself: Take your car to a qualified mechanic. Attempting to work on a fuel system without the proper knowledge and safety precautions can be dangerous.
Replacing a fuel pump is often a job best left to a professional unless you have experience with car repair, as it usually requires dropping the fuel tank. The cost of parts and labor can vary depending on your location and the mechanic.
