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Home >> Toyota >> 1997 >> T100 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 2.7L >> Fuel System >> Fuel Control >> Fuel Injectors
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Fuel Injectors

  1. Ensure ignition is off. Disconnect electrical connector at fuel injector. Using ohmmeter, check resistance between electrical terminals on fuel injector. Replace fuel injector if resistance is not within specification. See FUEL INJECTOR RESISTANCE  table.
  2. To check fuel injector volume, remove fuel injector. See FUEL RAILS & FUEL INJECTORS under FUEL SYSTEM in REMOVE/INSTALL/OVERHAUL - 2.7L article. Disconnect fuel hose from fuel filter and use Delivery Hose (09268-41046) to install fuel injector on fuel filter. See Fig 1.
    NOTE: Fuel injector is connected between fuel pressure regulator on the delivery pipe and the fuel filter.
  3. Place fuel injector into a clean graduated container. Place vinyl tube on end of fuel injector to prevent fuel spillage.
  4. Use scan tool to operate the fuel pump to pressurize the fuel system. See FUEL PRESSURE under FUEL SYSTEM in BASIC TESTING - 2.7L article.
    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  under FUEL SYSTEM.
  5. 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.
    NOTE: Ensure difference between fuel injector volume on all fuel injectors is within specification. See FUEL INJECTOR VOLUME SPECIFICATIONS  table.
  6. Disconnect fuel injector tester. Ensure fuel leakage from end of fuel injector is one drop or less in specified time. See FUEL INJECTOR LEAKAGE SPECIFICATIONS  table. Replace fuel injector if leakage exceeds specified amount.
FUEL INJECTOR RESISTANCE - Ohms @ 68°F (20°C)

Application Ohms
2.7L 12.0-16.0
FUEL INJECTOR VOLUME SPECIFICATIONS

Application Cu. In. (cc)
2.7L 4.2-5.4 (69-88)
Maximum Difference Between Each Fuel Injector .3 (5)
FUEL INJECTOR LEAKAGE SPECIFICATIONS

Application Leakage Time
2.7L 1 Minute
Fig 1: Connections For Testing Typical Fuel Injector
G97F06368Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Connecting Fuel Injector Tester
G95J33687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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