Fuel Injector Volume
- To check fuel injector volume, remove fuel injector. See FUEL SYSTEM
in REMOVAL, OVERHAUL & INSTALLATION article. Fuel injector is connected to fuel filter and fuel pressure regulator for checking fuel injector volume. Ensure area around fuel filter and fuel inlet hose at end of fuel filter is clean. See Fig 1.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CAUTION:
Use care when disconnecting fuel inlet hose from end of fuel filter, as some residual fuel pressure may still exist in fuel system.
- Depress both sides of retainer and pull fuel inlet hose with disconnect fitting from fuel filter. See Fig 1. Purchase NEW fuel inlet hose Part No. (23271-50150) from parts department. Remove fuel pipe connector from end of NEW fuel inlet hose. See Fig 2.
- Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on fuel filter. See Fig 2. Ensure delivery hose and fuel pipe connector are properly connected on fuel filter.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove fuel pressure regulator from fuel rail. Using NEW "O" ring, install Union (SST 09268-41091) from fuel injector measuring kit on fuel pressure regulator. See Fig 2. Tighten bolts to 66 INCH lbs. (7.5 N.m). Connect delivery hose to union and fuel return hose to fuel pressure regulator.
- Check that "O" ring is installed on top of fuel injector. Using Adapter (SST 09268-41110) and Clamp (SST 09268-41300) 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 electrical terminals on fuel pump. For operating of fuel pump, see FUEL PUMP RESISTANCE & OPERATION under FUEL DELIVERY.
- Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. See Fig 2. 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 within 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 pipe on fuel filter to allow for ease of disconnect fitting and fuel inlet hose installation.
CAUTION:
DO NOT reuse old retainer when installing fuel inlet hose on fuel filter. Always use a NEW retainer.
- Using NEW retainer, install fuel inlet hose on fuel filter until "click" sound is heard. DO NOT reuse old retainer. Pull on fuel inlet hose to ensure fuel pipe connector is properly locked on fuel filter.
- Using NEW "O" ring, install fuel pressure regulator. Tighten fuel pressure regulator bolts to 66 INCH lbs. (7.5 N.m). Install negative battery cable. Check for fuel leaks by using scan tool to energize fuel pump.
FUEL INJECTOR VOLUME SPECIFICATIONS
| Application |
Cu. In. (cc) |
| Volume |
3.4-4.2 (56-69) |
| Maximum Difference Between Fuel Injectors |
.8 (13) |