Checking the Fuel Pressure Regulator (9-5 - 2.3L)

1. Remove the valve cap. Connect the Fuel Pressure Gauge (83 93 852) and Adapter (83 94 744) to the fuel-injection rail with the "safety" on. Take "safety" off r. See Fig 1 .
2. Detach the vacuum hose from the pressure regulator and attach the Pressure/Vacuum Pump (30 14 883) and the Boost Pressure Gauge (83 93 514). See Fig 2 .
3. Start the fuel pump with the diagnostic tool. See Fig 3 .
4. Check the reading at barometric pressure. The reading should be 43 psi (3.0 bar). See Fig 4 .
5. Increase the negative pressure in the pressure regulator by means of the pressure/vacuum pump. System pressure should drop by the same amount as indicated on the pressure gauge. System pressure should be 43 psi (3.0 bar)
6. Pump up the pressure in the pressure regulator with the vacuum pump. The system pressure should now increase with the same amount as the reading on the pressure gauge. See Fig 5 .
7. Turn off the fuel pump with the diagnostic tool.
8. Put the "safety" on the adapter and remove the pressure gauge equipment from the service nipple. Screw on the valve cap.

Fig 1: Checking Fuel Pressure Regulator (9-5 - 4-Cyl - 1 Of 5)

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Fig 2: Checking Fuel Pressure Regulator (9-5 - 4-Cyl - 2 Of 5)

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Fig 3: Checking Fuel Pressure Regulator (9-5 - 4-Cyl - 3 Of 5)

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Fig 4: Checking Fuel Pressure Regulator (9-5 - 4-Cyl - 4 Of 5)

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Fig 5: Checking Fuel Pressure Regulator (9-5 - 4-Cyl - 5 Of 5)

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