Fuel System

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 pipe support.

NOTE:
- Put a shop towel under the fuel pipe support.
- Slowly loosen the union bolt.




d. Install the fuel inlet hose and SST (pressure gauge) to the fuel pipe support with the 3 gaskets and SST (union and adapter).

SST 09268-45014 (09268-41190, 90405-06167)

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

e. Wipe off any splattered gasoline.




f. Connect a LEXUS hand-held tester to the DLC3. (See step 1 in check fuel pump operation (a) to (e))
g. Measure the fuel pressure.

Fuel pressure: 304 - 343 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 the fuel hoses and connections, fuel pump, fuel filter and fuel pressure regulator.

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

Fuel pressure: 304 - 343 kPa (3.1 - 3.5 kgf/sq.cm, 44 - 50 psi)

k. Stop the engine.
l. 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.

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

SST 09268-45014

n. Reconnect the fuel inlet hose to the fuel pipe support with 2 new gaskets and the union bolt.

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

o. Reconnect the negative (-) terminal cable to the battery.
p. Check for fuel leaks.