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Fuel System Rest Pressure

  1. Relieve fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL PRESSURE  . Connect a 0-100 psi (0-7.0 kg/cm2 ) fuel pressure gauge to the pressure test port fitting on fuel rail. Start engine and note reading on pressure gauge. Shut engine off.
  2. Wait 30 minutes and check fuel pressure. Fuel pressure should be within 20 psi (1.4 kg/cm2 ) of first reading. If pressure is not as indicated, check fuel system for leaks at fuel pressure regulator, fuel pump check valve or fuel injectors.
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