Remove fuel injector. See FUEL SYSTEM in REMOVAL, OVERHAUL & INSTALLATION article. Fuel injector is connected to fuel inlet pipe for checking fuel injector volume. Remove fuel hose clamp from No. 1 fuel pipe at fuel inlet pipe. Perform STEP 1. See Fig 1. Ensure area around No. 1 fuel pipe and fuel inlet pipe is clean. Depress both sides of retainer and pull No. 1 fuel pipe with disconnect fitting from fuel inlet pipe. Perform STEP 2. See Fig 1.
Purchase a NEW No. 1 fuel pipe Part No. (23801-20040) from parts department. Remove fuel pipe connector from end of NEW No. 1 fuel pipe. See Fig 2.
Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on fuel inlet pipe. See Fig 2. Ensure delivery hose and fuel pipe connector are properly connected on fuel inlet pipe. Check that grommet and "O" ring are installed on top of fuel injector. Using clamp and union from fuel injector measuring kit, connect fuel injector to delivery hose. See Fig 2.
Place fuel injector into a clean graduated container. Place vinyl tube on end of fuel injector to prevent fuel spillage. Connect scan tool to data link connector No. 3. See Figure. Turn ignition on. Turn scan tool on. Select ACTIVE TEST MODE on scan tool. Using scan tool manufacturer's instructions, activate fuel pump.
NOTE: Fuel pump may also be operated to pressurize fuel system by applying battery voltage to fuel pump connector terminals. For operating of fuel pump, see FUEL PUMP OPERATION (USING BATTERY VOLTAGE) under FUEL DELIVERY.
Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. See Figure. Measure fuel injector volume. Test each fuel injector 2-3 times. Replace fuel injector if fuel injector volume is not within specification. See FUEL INJECTOR VOLUME SPECIFICATIONS table. Ensure difference between fuel injector volume on all fuel injectors is within specification.
Disconnect fuel injector tester. Ensure fuel leakage from end of fuel injector does not exceed one drop every 12 minutes. Replace fuel injector if leakage exceeds specification. Disconnect negative battery cable. Remove test equipment. Apply light coat of engine oil on tip of fuel inlet pipe to allow for ease of disconnect fitting and No. 1 fuel pipe installation.
CAUTION: DO NOT reuse old retainer when installing No. 1 fuel pipe on fuel inlet pipe. Always use a NEW retainer.
Using NEW retainer, install No. 1 fuel pipe on fuel inlet line until "click" sound is heard. DO NOT reuse old retainer. Pull on No. 1 fuel pipe to ensure fuel pipe connector is properly locked on fuel inlet pipe.
Reinstall fuel pipe clamp until "click" sound is heard. Pull upward on fuel pipe clamp to ensure clamp is securely locked on fuel inlet pipe. Install negative battery cable. Check for fuel leaks by using scan tool to energize fuel pump.

Fig 1: Disconnecting No. 1 Fuel Pipe From Fuel Inlet Pipe (RX300)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Fuel Injector Volume (RX300)

Use the Manual With the Right Hardware

When to See a Mechanic

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