1. Check the Starter:
* Listen closely: Does the starter engage when you turn the key? You should hear a "clicking" sound. If not, the starter motor might be faulty.
* Test the starter: If you're comfortable with basic car repair, you can test the starter by using a jumper cable to bypass the starter solenoid. This will eliminate the solenoid as a culprit.
* Starter Replacement: If the starter is faulty, you'll need to replace it. It's a common issue, especially on older cars.
2. Check the Fuel System:
* Fuel Pump: Make sure the fuel pump is working. You can often hear it prime when you turn the key to the "on" position but not start the car. If you don't hear it, the pump might be failing.
* Fuel Filter: A clogged fuel filter can prevent fuel from reaching the engine. This is an easy and inexpensive part to replace.
* Fuel Lines: Inspect the fuel lines for any cracks or leaks.
3. Check the Ignition System:
* Spark Plugs and Wires: Worn or fouled spark plugs can prevent a spark, and damaged wires can lead to a weak spark.
* Distributor (if applicable): If your Cavalier has a distributor, inspect the rotor and cap for wear and tear.
* Ignition Coil: A failing ignition coil can prevent the spark plugs from firing properly.
4. Other Potential Issues:
* Alternator: A faulty alternator won't charge the battery, even if the battery is currently good. This can lead to starting issues in the future.
* Loose Connections: Inspect all connections in the starting and ignition systems for corrosion or looseness.
* Security System: Some Cavaliers have security systems that can prevent the car from starting.
* Immobilizer: A failed immobilizer can prevent the car from starting.
Troubleshooting Steps:
1. Start with the easy stuff: Check the battery terminals for corrosion, make sure all connections are tight, and ensure the fuel tank has gas.
2. Listen closely: Does the engine crank but not start? This suggests a fuel or ignition problem. Does it just click? This might point to a starter issue.
3. Use a code reader: If you have a code reader, connect it to the car's OBD-II port. It can provide diagnostic codes that will help identify the problem.
4. Consult a mechanic: If you can't diagnose the problem, a mechanic will have the tools and experience to determine the cause.
Important Note: This is a general guide. Always consult the owner's manual or a repair guide specific to your 2002 Chevy Cavalier for detailed troubleshooting steps.
