2000 Chevrolet Pickup C2500, 4D Pickup, 6.5 F, StandardFACTORY OEM SERVICE PROCEDURE

Injector Coil Test - ECT Is Not 50-95°F (2.2L - VIN 4)

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. Install scan tool. Using scan tool, check engine coolant temperature. If coolant temperature is not 50-95°F (10-35°C), go to next step. If coolant temperature is 50-95°F (10-35°C), perform injector coil test. See INJECTOR COIL TEST - ECT IS 50-95°F (2.2L - VIN 4) .
    3. NOTE: Perform step  3 on each injector.
  3. Turn ignition off. Relieve fuel pressure. 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 Coil Test 2.5-amp position. Connect DVOM to injector tester. Depress PUSH TO START TEST button. Record lowest voltage reading within first second of test. Record highest voltage reading other than those above 9.5 volts. Subtract any other voltage reading observed from highest voltage reading. Repeat procedure for each injector. If difference is greater than 4.7-5.8 volts, go to next step. If difference is less than 4.7-5.8 volts, perform injector balance test. See INJECTOR BALANCE TEST (2.2L - VIN 4 & 3.4L) .
  4. Replace any injector(s) showing an initial reading greater than 9.5 volts, erratic reading or difference is greater than 0.6 volt. After repairs, perform injector balance test. See INJECTOR BALANCE TEST (2.2L - VIN 4 & 3.4L) .
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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.

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