Fuel Pressure: Testing and Inspection

CHECK FUEL PRESSURE







a. Prepare a new fuel tube.
1. Using a cutter knife, cut the protector of the fuel tube protector as illustrated. Tear the protector by hand, then remove the fuel tube connector.

NOTE: If the protector is cut too deeply with the cutter, the O-ring of the fuel tube connector will be damaged.

b. Discharge fuel system pressure.
c. Using a voltmeter, measure the battery voltage.

Standard: 9.0 to 14 V

d. Disconnect the battery negative terminal.




e. Remove the fuel pipe clamp No. 1.
f. Disconnect the fuel tube.
g. Pinch the retainer of the fuel tube connector, then pull the fuel tube connector out of the pipe to disconnect the fuel tube.

NOTE:
- Remove any dirt and foreign objects on the fuel tube connector before performing this work.
- Do not allow any scratches or foreign objects on the parts when disconnecting, as the fuel tube connector has the O-ring that seals the pipe.




- Perform this work by hand. Do not use any tools.
- Do not forcibly bend, twist or turn the nylon tube.
- Protect the disconnected part by covering it with a vinyl bag after disconnecting the fuel tube.
- If the fuel tube connector and pipe are stuck, push and pull to release them.




h. Install SST and the fuel tube connector into the vehicle.

SST 09268-41047 (95336-08070), 09268-45014 (09268-41200, 09268-41220, 09268-41250)

i. Wipe off any split gasoline.
j. Connect the battery negative terminal.

Torque: 5.4 N.m (55 kgf.cm, 48 in.lbf)




k. Connect the hand-held tester to the DLC3.
l. Turn the ignition switch to ON.
m. Turn the hand-held tester ON.
n. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP/SPD.




o. If you have no hand-held tester, connect the positive (+) lead from the battery to terminal 5 of the connector, and the negative (-) lead to terminal 4.
p. Measure the fuel pressure.

Standard: 304 to 343 kPa (3.1 to 3.5 kgf/sq.cm, 44 to 50 psi)

- If the fuel pressure is greater than the standard value, replace the fuel pump.
- If the fuel pressure is less than the standard value, check the connection of the fuel hose and fuel pump.




q. Disconnect the hand-held tester from the DLC3.
r. Start the engine.
s. Measure the fuel pressure when the engine idles.

Standard: 304 to 343 kPa (3.1 to 3.5 kgf/sq.cm, 44 to 50 psi)

t. Stop the engine.
u. After stopping the engine, check that the fuel pressure does not charge for 5 minutes.

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

If the fuel pressure is not as specified, check that the fuel pump or fuel injector.




v. Connect the fuel tube.
1. Align the fuel tube connector with the pipe, then push the fuel tube connector in until the retainer makes a "click" sound to connect the fuel tube to the pipe.

NOTE:
- Check that there are no scratches or foreign objects around the connected part of the fuel tube connector and pipe before performing this work.
- After connecting the fuel tube, check that the fuel tube is securely connected by pulling the fuel tube connector.

w. Install the fuel pipe clamp No. 1.
x. Check for fuel leakage.