Engine Does Not Start or Starts With Difficulty

1. Defective relay assembly.
2. Inoperative fuel pump.
3. Cold start injector leaking or inoperative.
4. Defective thermo-coolant time switch.
5. Auxiliary air regulator not opening.
6. Defective airflow meter.
7. Leak in air intake system.
8. Defective injectors.
9. Low fuel pressure.
10. Defective coolant temperature switch.
11. Open or short circuit in harness wiring.
12. Defective electronic controller.