Engine Hesitates on Acceleration

1. Clogged pressure sensor vacuum passage.
2. Defective throttle valve operation.
3. Poor performance of Throttle Position sensor.
4. Improper fuel pressure.
5. Faulty EGR system.
6. Faulty injector.
7. Poor performance of Water Temp., Air Temp. or Pressure sensors.
8. Faulty ECM.