Human: My car isn't starting. What are the possible causes and what can I do? Assistant: 
Possible Causes of a Car Not Starting
1. Dead battery
2. Bad spark plug(s)
3. Poor electrical connection
4. Faulty starter motor
5. Clogged fuel filter
6. Blocked exhaust system
7. Low engine coolant level
8. Disconnected negative battery cable
9. Incorrectly set ignition timing