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Test NS-4A: Repairing Low Fuel Pressure

WARNING: Fuel system may be under pressure. Release fuel pressure before opening system for testing or component replacement. See FUEL PRESSURE RELEASE FUEL PRESSURE RELEASE.
  1. Turn ignition off. Inspect fuel lines from fuel filter/pressure regulator to fuel rail for restrictions. Repair restricted fuel lines as necessary. Perform TEST VER-1A. If fuel lines are okay, go to next step.
  2. At this time, fuel pump module is assumed to be defective. Replace fuel pump module. Fuel pump module is located in fuel tank. Perform TEST VER-1A.
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