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Home >> Chevrolet >> 2000 >> Tracker 4D Utility, RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Engine Component Tests >> Fuel System >> Fuel Control >> Fuel Injector Balance Test
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Fuel Injector Balance Test

NOTE: Allow engine to cool down to avoid irregular reading due to "hot soak" condition. To prevent flooding, the fuel injector balance test should not be performed more than once without starting and running engine.
NOTE: If injectors are dirty, they should be cleaned using approved injector cleaning procedure before performing fuel injector balance test.
  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article. Go to next step.
  2. If fuel injector coil test has been performed, go to next step. If fuel injector coil test has not been performed, perform fuel injector coil test. See INJECTOR COIL TEST - ECT IS 50-95°F  . Go to next step.
  3. If engine coolant temperature is greater than 201°F (94°C), go to next step. If engine coolant temperature is less than 201°F (94°C), go to step  5 .
  4. Allow engine to cool to less than 201°F (94°C) and go to next step.
  5. Install fuel pressure gauge. Turn ignition on, and then off to energize fuel pump. Place fuel pressure gauge bleed hose into a container. Bleed air from fuel pressure gauge. Turn ignition on, and then off to energize fuel pump again. Observe fuel pressure gauge reading. If fuel pressure reading is 36-43 psi (2.5-3.0 kg/cm2 ), go to next step. If fuel pressure reading is not 36-43 psi (2.5-3.0 kg/cm2 ), perform fuel system diagnosis. See appropriate BASIC DIAGNOSTIC PROCEDURES article.
    6. NOTE: Perform step 6)  on each injector.
  6. Disconnect fuel injectors harness connector. Using appropriate fuel injector adapter, connect Fuel Injector Tester (J-39021) to fuel injector. Connect fuel injector tester power leads to appropriate battery terminals. Set amperage supply selector switch on fuel injector tester to Balance Test 0.5-2.5-amp position. Turn ignition on, and then off. Record fuel pressure reading (first reading). Energize injector by depressing PUSH TO START TEST button on injector tester and hold until fuel pressure gauge stabilizes. Record fuel pressure reading (second reading). Subtract first reading from second reading (this result is pressure drop value). Add pressure drop value for each injector together and divide total by total number of injectors. If any injector's drop value is greater or less than average drop value by 1.5 psi (0.10 kg/cm), replace faulty injector(s) as necessary. If no injector's drop value is greater or less than average drop value by 1.5 psi (0.10 kg/cm), repair by symptom. See appropriate TROUBLE SHOOTING - NO CODES article.
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