Will Not Idle

1. Shortage of fuel in fuel tank.
2. Faulty Idle Speed Control solenoid valve control system.
3. Improperly adjusted idle speed adjusting screw.
4. Faulty air valve.
5. Faulty EGR system.
6. Improper fuel pressure.
7. Faulty injector.
8. Poor performance of Water Temp., Air Temp. or Pressure sensors
9. Faulty ECM.