Injector Coil Test - ECT Is Not 50-95°F
WARNING:
In order to prevent flooding of cylinder and possible engine damage, relieve fuel pressure before performing injector coil test procedure.
- Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article. Go to next step.
- Install scan tool. Using scan tool, check engine coolant temperature. If scan tool does not display 50-95°F (10-35°C), go to next step. If scan tool displays 50-95°F (10-35°C), perform injector coil test. See INJECTOR COIL TEST - ECT IS 50-95°F .
- Turn ignition off. Relieve fuel pressure. Disconnect fuel injector harness connectors. Using 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 0.5-amp position. Connect DVOM to injector tester. Depress PUSH TO START TEST button on injector tester. Record highest voltage reading other than those greater than 9.5 volts. Subtract any other voltage reading observed from highest voltage reading. If difference is greater than one volt, go to next step. If difference is not greater than one volt, perform fuel injector balance test. See FUEL INJECTOR BALANCE TEST .
- Replace any injector(s) with an initial reading greater than 9.5 volts, erratic reading or difference greater than 0.6 volt. After repairs, perform fuel injector balance test. See FUEL INJECTOR BALANCE TEST .
NOTE:
Perform step 3)
on each injector.