Fuel Injector Volume (RX300)
- Disconnect negative battery cable. Remove fuel injector. See FUEL SYSTEM in REMOVAL, OVERHAUL & INSTALLATION article. Purchase new No. 1 Fuel Pipe (23801-20150) and take out fuel tube connector from its pipe. See Figure.
- Remove fuel hose clamp. Disconnect No. 1 fuel pipe (fuel tube connector) from fuel inlet pipe. If there is retained fuel pressure, prevent fuel splash inside engine compartment. See Fig 1. Install Pressure Gauge and fuel tube connector. Wipe off any splattered gasoline. Reconnect negative battery cable. Connect hand-held tester or OBD-II scan tool to DLC3.
- 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 SYSTEM in BASIC DIAGNOSTIC PROCEDURES article.
- Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. 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.