Fuel Pressure Regulator: Testing and Inspection
FUEL LINE PRESSURE INSPECTIONWARNING: Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete the "Fuel Pressure Release Procedure".
1. Disconnect the negative battery cable.
Fuel Pressure Gauge Installation:
2. Connect a fuel pressure gauge between the fuel filter and the main fuel hose. (Install clamps as shown.)
3. Connect the negative battery cable.
4. Start the engine and run it at idle.
5. Measure the fuel line pressure.
Fuel line pressure: 210-260 kPa (2.1-2.7 kgf/cm2, 30-38 psi)
6. Disconnect the vacuum hose from the pressure regulator and measure the fuel line pressure.
Fuel line pressure: 260-320 kPa (2.6-3.3 kgf/cm2, 37-46 psi)
HOLD PRESSURE
1. Disconnect the negative battery terminal.
Fuel Pressure Gauge Installation:
2. Connect a fuel pressure gauge between the fuel filter and the main fuel hose. (Install clamps as shown.)
3. Connect the negative battery terminal.
DLC-1 Fuel Pump Relay Bypass Jumper:
4. Connect the data link connector terminals F/P and GND with a jumper wire.
5. Turn the ignition switch to ON for 10 sec. to operate the fuel pump.
6. Turn the ignition switch to OFF and disconnect the jumper wire.
Crimping Return Line During Testing:
7. Pinch the fuel return hose with a plier.
8. Observe the fuel pressure for 5 min..
Fuel pressure: More than 150 kPa (1.5 kgf/cm2, 21 psi)
9. If not as specified, replace the pressure regulator.