Altima V6-3.5L (VQ35) (2003)
Fuel Pressure: Testing and Inspection
FUEL PRESSURE CHECK
NOTE:
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Use Fuel Pressure Gauge Kit (J-44321) to check fuel pressure.
1. Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE".
2. Install the inline fuel quick disconnect fitting between the connection of the fuel feed hose (from tank) and the fuel hose (to engine).
3. Connect the fuel pressure test gauge (quick connect adapter hose) to the quick disconnect fitting.
4. Turn ignition switch ON and check for fuel leakage.
5. Start engine and check for fuel leakage.
6. Read the indication of fuel pressure gauge.
At idling: Approximately 350 kPa (3.7 kg/sq.cm, 51 psi)
7. If result is unsatisfactory, go to next step.
8. Check the following.
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Fuel hoses and fuel tubes for clogging
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Fuel filter for clogging
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Fuel pump
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Fuel pressure regulator for clogging
If OK, replace fuel pressure regulator.
If NG, repair or replace.