Fuel Pressure: Testing and Inspection
CHECK FUEL PRESSUREa. Check the battery positive voltage is above 12 V.
b. Disconnect the negative (-) terminal cable from the battery.
c. Purchase a new fuel tube and remove the fuel tube connector from its pipe.
Fuel tube: Part No. 23901-22070
d. Disconnect the fuel tube clamp from the fuel tube connector.
e. Disconnect the fuel inlet tube (fuel tube connector) from the fuel pipe.
CAUTION: Disconnect the fuel tube connector (quick type) observing the precaution.
As there is retained pressure in the fuel line, prevent if from splashing inside the engine compartment.
f. Install SST (pressure gauge) as shown in the illustration by using SST and fuel tube connector.
SST 09268-41047, 09268-45014 (09268-41250)
g. Wipe off any splattered gasoline.
h. Reconnect the negative (-) terminal cable to the battery.
i. Connect the hand-held tester to the DLC3.
j. Measure the fuel pressure.
Fuel pressure:
301 - 347 kPa (3.1 - 3.5 kgf/sq.cm, 44 - 50 psi)
If the pressure is high, replace the fuel pressure regulator.
If the pressure is low, check the fuel hoses and connections, fuel pump, fuel filter and fuel pressure regulator.
k. Disconnect the hand-held tester from the DLC3.
l. Start the engine.
m. Measure the fuel pressure at idle.
Fuel pressure:
301 - 347 kPa (3.1 - 3.5 kgf/sq.cm, 44 - 50 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 the pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.
p. After checking the 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 09268-41047, 09268-45014
q. Reconnect the fuel inlet tube (fuel tube connector).
CAUTION: Connect the fuel tube connector (quick type) observing the precaution.
r. Install the fuel tube clamp to the fuel tube connector.
s. Reconnect the negative (-) terminal cable to the battery.
t. Check for fuel leaks.