Rio L4-1.5L (2001)
Fuel Pressure: Testing and Inspection
Fuel Line Pressure Inspection
1. Disconnect negative battery cable.
2. Release fuel system pressure.
3. Raise a vehicle.
4. Install SST(0K2A1 131 001A) to fuel filter as shown.
5. Connect negative battery cable.
6. Connect data link connector terminals FUEL PUMP and B+ with jumper wire.
7. Turn ignition switch ON.
8. Inspect the fuel line pressure.
Fuel line pressure: 46 - 51 psi (320 - 350 kPa, 3.2 - 3.5 kg/sq.cm)
Pressure too high:
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Check for restricted fuel return line
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If line is clean, replace pressure regulator Pressure too low:
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Clamp return line and check if pressure rises
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If pressure does rise, replace pressure regulator.
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If pressure does not rise, measure fuel pump maximum pressure.
9. Turn ignition switch OFF and remove jumper wire.
