* Is there fuel in the tank?
* Is the fuel pump working?
* Are the fuel lines clear?
* Is the fuel filter clean?
* Is the fuel pressure regulator working properly?
2. Check the ignition system.
* Are the spark plugs in good condition?
* Are the spark plug wires in good condition?
* Is the distributor cap in good condition?
* Is the ignition coil in good condition?
3. Check the air intake system.
* Is the air filter clean?
* Are the air intake hoses clear?
4. Check the exhaust system.
* Is the catalytic converter in good condition?
* Is the muffler in good condition?
5. Check the electrical system.
* Is the battery in good condition?
* Are the battery terminals clean?
* Is the starter motor in good condition?
* Are the electrical wires in good condition?
6. Other Possible Causes:
* Engine compression
* Faulty crankshaft sensor
* Faulty camshaft sensor