Operation Check

Using a HI-SCAN:

• Activate the fuel injectors in sequence.
• Check the operating time of the injectors.
  Fig 1: Checking Operating Time Of Injectors

  Courtesy of HYUNDAI MOTOR CO.

Operation Sound Check

1. Using a stethoscope, check the injectors for a clicking sound at idle. Check that the sound is produced at shorter intervals as the engine speed increases.
   NOTE: Ensure that the sound from an adjacent injector is not being transmitted along the delivery pipe to an inoperative injector.
2. If a stethoscope is not available, check the injector operation with your finger.

   If no vibrations are felt, check the wiring connector, injector, or injection signal from ECM.

   Fig 2: Checking Injector Operation

   Courtesy of HYUNDAI MOTOR CO.