Fuel Pressure: Testing and Inspection

CHECK FUEL PRESSURE
a. Check the battery positive voltage is above 12 V.
b. Disconnect the negative (-) terminal cable from the battery.





c. Remove the union bolt and 2 gaskets, and disconnect the fuel inlet hose from the fuel filter outlet.

CAUTION:
- Put a shop towel under the fuel filter.
- Slowly loosen the union bolt.





d. Install the fuel inlet hose and SST (pressure gauge) to the fuel filter outlet with the 3 gaskets and SST (union bolt).

SST 09268-45012 (09268-41190, 90405-06167)

Torque: 29 Nm (300 kgf.cm, 22 ft.lbf)

e. Wipe off any splattered gasoline.
f. Reconnect the negative (-) terminal cable to the battery.
g. Connect the TOYOTA hand-held tester to the DLC3. (See step 1 in check fuel pump operation (a) to (f))
h. Turn the ignition switch ON.
i. Measure the fuel pressure.

Fuel pressure: 265-304 kPa (2.7-3.1 kgf/Sq.cm, 38-44 psi)

If pressure is high, replace the fuel pressure regulator. If pressure is low, check these parts;
- Fuel hoses and connections
- Fuel pump
- Fuel filter
- Fuel pressure regulator

j. Disconnect the TOYOTA hand-held tester from the DLC3.
k. Reinstall the fuse cover on the instrument panel.
l. Start the engine.
m. Measure the fuel pressure at idle.

Fuel pressure: 226 - 265 kPa (2.3 - 2.7 kgf/sq.cm, 33 - 38 psi)

n. Stop the engine.
o. Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.

Fuel pressure: 147 kPa (1.5 kgf/sq.cm, 21 psi) or more

If pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.

p. After checking fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST and fuel tube connector to prevent gasoline from splashing.

SST 09268-45012

q. Reconnect the fuel inlet hose with 2 new gaskets and the union bolt.

Torque: 29 Nm (300 kgf.cm, 21 ft.lbf)

r. Reconnect the negative (-) terminal cable to the battery.
s. Check for fuel leakage.