* Fuel Pump: This is the most likely culprit. The fuel pump is responsible for pushing fuel from the tank to the engine. If it's faulty (failed completely or simply weak), it won't deliver enough pressure to keep the engine running. You might hear a humming sound from the fuel pump when you turn the key to the "on" position (before cranking). If you don't hear anything, the pump might be dead.
* Fuel Pump Relay: The fuel pump relay acts as a switch, turning the pump on and off. A bad relay will prevent the pump from receiving power. This is an easy and inexpensive part to replace.
* Fuel Filter: A severely clogged fuel filter can restrict fuel flow to the point where the engine starves for fuel and dies.
* Clogged Fuel Line: While less common, a blockage somewhere in the fuel line (either debris or corrosion) can prevent fuel from reaching the engine.
* Fuel Pressure Regulator: This regulator controls the pressure of fuel delivered to the injectors. A malfunctioning regulator could cause low fuel pressure or even a fuel leak, preventing the engine from running.
* Inertia Switch: Some vehicles have an inertia switch that cuts off fuel supply in a collision. This switch might have accidentally been tripped. Locate it (often under the dash or in the trunk) and check if it needs to be reset.
* Crankshaft Position Sensor (CKP Sensor): While this sensor doesn't directly affect fuel delivery, a faulty CKP sensor can prevent the engine from running properly and may lead to the symptoms you are describing. The engine control module (ECM) relies on the signal from this sensor to fire the injectors.
Troubleshooting Steps:
1. Check the fuel pump: Listen carefully for the fuel pump's hum when you turn the ignition key to the "on" position (but don't crank the engine). If you don't hear it, suspect the pump or its relay. A mechanic can test the pump's pressure.
2. Check the fuel pump relay: Locate the fuel pump relay (consult your owner's manual or an online repair guide) and swap it with another relay of the same amperage (a different relay of similar type will do for a test). See if that resolves the issue.
3. Check the fuel filter: Locate the fuel filter and visually inspect it. If it's extremely dirty or damaged, replace it.
4. Check the inertia switch: If equipped, reset the inertia switch.
5. Check fuel pressure: This requires a fuel pressure gauge and is best done by a mechanic, but it directly measures the fuel pressure in the fuel rail. Low pressure confirms a fuel delivery problem.
Important Note: Working with fuel systems involves flammable liquids. Take appropriate safety precautions, including working in a well-ventilated area and avoiding sparks or open flames. If you're not comfortable performing these checks yourself, take your vehicle to a qualified mechanic for diagnosis and repair.
