Fuel Pressure Regulator
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Nissan Xterra, 2003 Nissan Sentra, 2003 Nissan Pathfinder, 2003 Nissan Murano, and 2003 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
- Relieve fuel pressure from system. See RELIEVING FUEL PRESSURE . Connect fuel pressure gauge in line between fuel filter and fuel rail. Remove vacuum hose from fuel pressure regulator, and plug hose. Connect hand-held vacuum pump to pressure regulator. Start engine and let idle.
- Gradually apply vacuum to regulator. Fuel pressure should decrease as vacuum increases. Compare values to CHECKING FUEL PRESSURE under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If results are not as specified, replace fuel pressure regulator.