* Dead or Weak Battery: Even if the engine cranks, a weak battery might not provide enough power to fully ignite the spark plugs or fuel pump. Test the battery voltage.
* Faulty Battery Cables or Connections: Corroded or loose battery terminals or cables can prevent sufficient current flow. Clean and tighten them.
* Alternator Problems: While not directly preventing cranking, a failing alternator might not be charging the battery sufficiently, leading to the car starting but quickly dying.
* Ignition Switch Issues: A malfunctioning ignition switch might not be sending power to the necessary components. This is less likely if it's cranking but worth considering.
* Fuel Pump Failure: The fuel pump might be malfunctioning, not delivering fuel to the engine. You might hear a whirring sound from the fuel pump when you turn the key – lack of sound could indicate a problem.
* Fuel Filter Clog: A clogged fuel filter can restrict fuel flow to the engine.
* Cranking Sensor Problems: A faulty crankshaft position sensor (CKP sensor) prevents the engine control module (ECM) from knowing the position of the crankshaft, making it unable to time the fuel injection and spark correctly.
* Cam Position Sensor (CMP) Problems: Similar to the CKP sensor, a bad CMP sensor can prevent proper ignition timing.
* Distributor Issues (If Applicable): Older vehicles like this might have a distributor. Worn points, a bad rotor, or a failing cap can prevent spark.
* Ignition Coil Problems: A faulty ignition coil won't deliver the high voltage needed to spark the plugs.
* Spark Plugs or Wires: Worn, fouled, or damaged spark plugs or wires can prevent proper ignition.
* Fuel Injectors: Clogged or faulty fuel injectors can prevent fuel from reaching the cylinders.
* Engine Control Module (ECM) Problems: A faulty ECM can cause a wide range of starting issues. This is a less likely culprit but possible.
Troubleshooting Steps:
1. Check the battery: Test its voltage.
2. Inspect battery cables and terminals: Clean and tighten them.
3. Listen for the fuel pump: Do you hear it prime when you turn the key?
4. Check the spark plugs: Are they sparking? A simple spark tester can help.
5. Check for fuel pressure: This requires a fuel pressure gauge, often a more advanced step.
If you're not comfortable working on your car, it's best to take it to a mechanic for diagnosis and repair. They have the tools and experience to pinpoint the exact problem efficiently.
