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Fuel Injectors

  1. Ensure ignition is off. Disconnect electrical connector at fuel injector. Using ohmmeter, measure resistance between fuel injector electrical terminals. Replace fuel injector if resistance is not within specification. See FUEL INJECTOR RESISTANCE SPECIFICATIONS  table.
  2. To check fuel injector spray pattern and volume, remove fuel injector. See N - REMOVE/INSTALL/OHAUL article. Disconnect fuel hose from fuel filter outlet. Use Delivery Hose (09268-41045) to install fuel injector between fuel filter and fuel pressure regulator. See Fig 1 and Fig 2.
  3. Place fuel injector into a clean graduated container. Place vinyl tube on end of fuel injector to prevent fuel spillage. Install Jumper Wire (SST 09843-18020) between +B and FP terminals of data link connector No. 1. Turn ignition on, with engine off to pressurize fuel system.
    NOTE: For proper location of data link connector No. 1 and terminal identification, see BASIC TESTING article. Jumper wire is installed in data link connector No. 1 when checking fuel pump operation and fuel pressure.
  4. Connect fuel injector tester to fuel injector for 15 seconds. Use Fuel Injector Tester (09842-30060) for Celica Turbo, MR2 Turbo and Supra Turbo or (09842-30070) for all others.
  5. Measure fuel injector volume and check spray pattern. Test each fuel injector 2-3 times. Replace fuel injector if volume is not as specified. 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. Turn ignition off and remove test equipment.
FUEL INJECTOR RESISTANCE SPECIFICATIONS

Application Ohms
Tercel 13.8
FUEL INJECTOR VOLUME SPECIFICATIONS

Application Cubic In. (cc)
Tercel 2.1-2.7 (34-44)
Maximum Difference Between Fuel Injectors .3 (5)
FUEL INJECTOR LEAKAGE SPECIFICATIONS

Application Leakage Time
Tercel 3 Minutes
Fig 1: Testing Fuel Injector Spray Pattern & Volume
G93F79934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Testing Fuel Injector For Leakage
G93G79935Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE: Fuel pressure control system may also be referred to as fuel pressure-up system.
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