Fuel Pressure: Testing and Inspection

2. 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

Torque: 29 N.m (300 kgf.cm, 21 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.)
h. Measure the fuel pressure.

Fuel pressure: 301 - 347 kPa (3.1-3.5 kgf/sq.cm, 44-50 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

i. Disconnect the TOYOTA hand-held tester from the DLC3.
j. Start the engine.
k. Measure the fuel pressure at idle.

Fuel pressure: 301-347 kPa (3.1-3.5 kgf/sq.cm, 44-50 psi)

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

Fuel pressure: 147 kPa (1.5 kgf/cm2, 21 psi) or more.
If pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.