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Fuel Pressure: Medallion

  1. Relieve fuel system pressure. Connect a fuel pressure gauge between fuel pressure regulator and fuel rail. Disconnect and plug vacuumhose from fuel pressure regulator. Connect a vacuum pump to pressure regulator. Start engine.
  2. With engine idling, fuel pressure should be 33-39 psi (2.3-2.7 kg/cm2 ). Apply 15 in. Hg to fuel pressure regulator. Fuel pressure should drop to 26-32 psi (1.8-2.2 kg/cm2 ).
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