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HOMESERVICE MANUALSCHEVROLET2000CHEVY EXPRESS G3500, VAN CARGO EXTENDED, 6.5 FREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - SYSTEM & COMPONENT TESTSFUEL SYSTEM (GASOLINE)FUEL CONTROLINJECTOR COIL TEST (EXCEPT 2.2L & 3.4L)
2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 F

Injector Coil Test (Except 2.2L & 3.4L)

2000 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.5 FSECTION Injector Coil Test (Except 2.2L & 3.4L)
WARNING: In order to prevent flooding of cylinder and possible engine damage, relieve fuel pressure before performing injector coil test procedure.
  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. Turn ignition off. Relieve fuel pressure. Connect Fuel Injector Tester (J-39021) to battery voltage. Connect Injector Switch Box (J-39021-210). Set amperage on fuel injector tester to 0.5 amp. Connect DVOM to fuel injector tester. Install scan tool and monitor engine coolant temperature. If coolant temperature is 50-95°F (10-35°C), go to step  4. If coolant temperature is not as specified, go to next step.
  3. Allow engine to warm or cool as necessary. If engine coolant temperature is now 50-95°F (10-35°C), go to next step.
    4. NOTE: Perform step  4 on each injector.
  4. Using fuel injector tester, press PUSH TO START TEST button and monitor DVOM reading. Repeat procedure for each injector. Voltage reading should be 5.44-7.53 volts. If voltage reading is as specified, go to next step. If voltage reading is not as specified, perform injector balance test. SeeINJECTOR BALANCE TEST (EXCEPT 2.2L & 3.4L) .
  5. Replace faulty injector nozzle and poppet assembly. After repairs, go to next step.
  6. Using scan tool, clear DTCs. Start engine. If engine starts and continues to run, go to next step. If engine does not start, or starts and dies, go to step  2.
  7. Warm engine to normal operating temperature. Using scan tool, retrieve DTCs. If no DTC(s) are set, system is okay. If any DTC(s) are set, perform appropriate DTC(s) test. See appropriate SELF-DIAGNOSTICS article.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.