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Home >> Plymouth >> 1995 >> Grand Voyager Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing - 3.0L >> Fuel System >> Fuel Pressure >> Fuel Pressure Release
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Fuel Pressure Release

  1. Fuel pressure must be fully released before opening fuel system or removing any fuel-carrying components. To release pressure in tank, open fuel tank cap slowly.
  2. To release remaining pressure in system, disconnect injector wiring harness. Connect a jumper wire between fuel rail harness connector A142 circuit terminal (Dark Green/Orange wire) and battery voltage. Ground one end of another jumper wire and use it to momentarily ground one injector. Repeat this procedure for 2 or 3 injectors or until no pressure exists.
WARNING: Before disconnecting any fuel line, or fuel system component during testing, repeat FUEL PRESSURE RELEASE procedure. Perform FUEL PUMP TEST with fuel tank at least half full.
NOTE: Vacuum supply line at fuel pressure regulator must be disconnected to obtain accurate pressure readings.
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