Engine Won't Start When Cold

1. Blown fuse.
2. Defective main relay.
3. Damaged injector.
4. Open or shorted fuel injector circuit.
5. Defective fuel pump main relay.
6. Poor fuel pump ground.
7. Frozen fuel line.
8. Blocked air filter.
9. Defective EGR control system.
10. Defective ECU.