Checking Fuel Pressure

Release fuel pressure to zero. See FUEL PRESSURE RELEASE . Install the inline fuel quick disconnected fitting between fuel damper and injector tube. See Fig 1, Fig 2, Fig 3 or Fig 4 . Connect the fuel pressure test gauge (quick connector adapter hose) to the inline fuel quick disconnected fitting.
Turn ignition switch ON and check for fuel leakage. Start engine and check for fuel leakage. Record fuel pressure gauge reading. See FUEL PRESSURE table.
If result is unsatisfactory, check the following, fuel hoses and fuel tubes for clogging, fuel filter for clogging, fuel pump, and fuel pressure regulator for clogging. If OK, replace fuel pressure regulator. If not OK, repair or replace components as necessary.

FUEL PRESSURE

Application	psi (kg/cm² )
All Models	51 (3.57)

Fig 1: Installing Fuel Pressure Gauge (FX35 & G35)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Installing Fuel Pressure Gauge (FX45, M45 & Q45)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Installing Fuel Pressure Gauge (I35)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Installing Fuel Pressure Gauge (QX4)

Courtesy of NISSAN MOTOR CO., U.S.A.