GX 470 V8-4.7L (2UZ-FE) (2004)
a. Check the battery positive voltage is above 12 V.
b. Disconnect the negative (-) terminal cable from the battery.
c. Remove the front fuel pipe from the LH delivery pipe.
d. Install the front fuel pipe and a SST (pressure gauge) to the delivery pipe with the 3 gaskets and another SST (adaptor).
SST 09268-45014 (09268-41200, 09268-41190, 90405-06167, 09268-41210, 90467-11009)
Torque:39 N.m (400 kgf.cm, 29 ft.lbf)
e. Wipe off any splattered gasoline.
f.
Reconnect the negative (-) terminal cable to the battery.
g. Connect the hand-held tester to the DLC3 (See step 1 in check fuel pump operation).
h. 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
i.
Disconnect the hand-held tester from the DLC3.
j.
Start the engine.
k. Measure the fuel pressure at idle.
Fuel pressure: 265 - 304 kPa (2.7 - 3.1 kgf/sq.cm, 38 - 44 psi)
l.
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/sq.cm, 21 psi) or more
If pressure is not as specified, check the fuel pump, pressure regulator and or injectors.
n. After checking the fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST to prevent gasoline
from splashing.
SST 09268-45014 (09268-41200, 09268-41190, 90405-06167, 09268-41210, 09467-11009)
o. Reinstall the front fuel pipe to the LH delivery pipe.
p. Reconnect the negative (-) terminal cable to the battery.
q. Check for fuel leaks (See step 1 in check fuel pump operation).