Fuel Pressure Check

CAUTION:

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
Be careful not to scratch or get the fuel hose connection area dirty when servicing, so that the quick connector o-ring maintains sealability.
Use Fuel Pressure Gauge Kit [- (J-44321)] and Fuel Pressure Adapter [- (J-44321-6)] to check fuel pressure.
Do not perform fuel pressure check with electrical system operating (i.e. lights, rear defog, A/C, etc.). Fuel pressure gauge may indicate false readings due to varying engine loads and changes in manifold vacuum.
Before disconnecting Fuel Pressure Gauge Kit [- (J-44321)] and Fuel Pressure Adapter [- (J-44321-6)], release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE ".

NOTE: Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pressure cannot be completely released because this models do not have fuel return system.

FUEL PRESSURE CHECK
1. Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE ".
2. Remove engine cover. Refer to "ENGINE CONTROL SYSTEM: COMPONENT PARTS LOCATION ".
3. Remove fuel hose using Quick Connector Release [- (J-45488)]. Refer to "REMOVAL AND INSTALLATION ".
  CAUTION:
  - Do not twist or kink fuel hose because it is plastic hose.
  - Do not remove fuel hose from quick connector.
  - Keep fuel hose connections clean.
4. Install Fuel Pressure Adapter [- (J-44321-6)] and Fuel Pressure Gauge kit [- (J-44321)] as shown in figure.
  CAUTION:
  - Do not distort or bend fuel rail tube when installing fuel pressure gauge adapter.
  - When reconnecting fuel hose, check the original fuel hose for damage and abnormality.
5. Turn ignition switch ON (reactivate fuel pump), and check for fuel leakage.
6. Start engine and check for fuel leakage.
7. Read the indication of fuel pressure gauge.
  CAUTION: During fuel pressure check, confirm for fuel leakage from fuel connection every 3 minutes.
  
  Fig 1: Installing Fuel Pressure Adapter And Fuel Pressure Gauge Kit
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  At idling: Approximately 350 kPa (3.57 kg/cm ² , 51 psi)
  
  Is the inspection result normal?
  
  YES: INSPECTION END
  
  NO: GO TO 2.
CHECK FUEL HOSES
Check the following.
- Fuel hoses and fuel tubes for clogging
- Fuel filter for clogging
- Fuel pump
- Fuel pressure regulator for clogging
  Is the inspection result normal?
  
  YES: Replace fuel pressure regulator. Refer to "ENGINE CONTROL SYSTEM: COMPONENT PARTS LOCATION ".
  
  NO: Repair or replace error-detected parts.