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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Engine Controls - System & Component Testing - 4 CYL & V6) >> Fuel System >> Fuel Delivery >> Fuel Pressure Regulator

Fuel Pressure Regulator

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2002 Nissan Xterra, 2002 Nissan Sentra, 2002 Nissan Quest, 2002 Nissan Pathfinder, and 2002 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. 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.
  2. Gradually apply vacuum to regulator. Fuel pressure should decrease as vacuum increases. Compare values to CHECKING FUEL PRESSURE in BASIC DIAGNOSTIC PROCEDURES article. If results are not as specified, replace fuel pressure regulator.
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