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Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308: No. 1 - 8 Cylinder Misfire, Multiple Cylinder Misfire >> Diagnostic Procedure >> 8. Check Fuel Pressure

8. Check Fuel Pressure

  1. Install all removed parts.
  2. Release fuel pressure to zero. Refer to FUEL PRESSURE RELEASE  .
  3. Install fuel pressure gauge and check fuel pressure. Refer to FUEL PRESSURE CHECK  .
    1. At idle: Approx. 350 kPa (3.57 kg/cm 2 , 51 psi) 

OK or NG 

OK: GO TO 10. CHECK IGNITION TIMING .

NG: GO TO 9.

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