Engine Hesitates or Poor Acceleration

1. Defective ignition system.
2. Defective air flow sensor.
3. Intake air temperature sensor shorted.
4. Throttle position sensor open or shorted.
5. Defective throttle pressure exchange solenoid valve.
6. Defective pressure sensor.
7. Stuck or closed EGR control solenoid valve.
8. Defective coolant temperature sensor.
9. Defective ECU.