Fuel Pressure Check

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger. 

• When reconnecting fuel line, always use new clamps. 
• Make sure that clamp screw does not contact adjacent parts. 
• Use a torque driver to tighten clamps. 
• Use Pressure Gauge to check fuel pressure. 
• Do not perform fuel pressure check with electrical system operating (i.e. lights, rear window defogger, A/C etc.). Fuel pressure gauge may indicate false readings due to varying engine loads and changes in manifold vacuum. 

1. Release fuel pressure to zero.
2. Disconnect fuel tube joint between fuel damper and injector tube and set fuel pressure check adapter (J44321).
   Fig 1: Disconnecting Fuel Line

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Install pressure gauge to the fuel pressure check adapter as shown in the figure.
4. Start engine and check for fuel leakage.
5. Read the indication of fuel pressure gauge.

   At idling: 

   With vacuum hose connected 

   Approximately 235 kPa (2.4 kg/cm ² , 34 psi) 

   With vacuum hose disconnected 

   Approximately 294 kPa (3.0 kg/cm ² , 43 psi) 

   Fig 2: Identifying Fuel Damper

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

If results are unsatisfactory, perform FUEL PRESSURE REGULATOR CHECK  .