Component Inspection

■ Check fuel rail pressure performance 

1. IG "OFF".
2. Engine start.
3. Monitor signal waveform of fuel rail pressure sensor with accelerating and decelerating.

   Specification:  the fuel rail pressure will be increased while accelerating the vehicle.

   Fig 1: Checking Signal Waveform Of Fuel Rail Pressure Sensor

   Courtesy of HYUNDAI MOTOR AMERICA
4. Is the measured signal waveform normal?

   YES 

   • Go to "Verification of Vehicle Repair " procedure.

   NO 

   • Substitute with a known - good fuel rail pressure sensor and check for proper operation. If the problem is corrected, replace fuel rail pressure sensor and go to "Verification of Vehicle Repair " procedure.