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Home >> Ford >> 1993 >> Probe Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - EEC >> Fuel System >> Fuel System Testing >> Fuel Injector Test
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Fuel Injector Test

  1. With engine idling or cranking (no start), use stethoscope to listen for consistent, operational sounds (clicking) coming from each injector. If operational sounds are present, go to FUEL INJECTOR LEAKAGE TEST. If operational sounds are not present, disconnect fuel injector connector and install continuity checker into injector connector. Start or crank engine.
  2. Observe whether continuity checker blinks, indicating completed circuit for injector being tested. Repeat continuity check for each injector. If all injector circuits indicate continuity, go to next step. If any circuit does not indicate continuity, turn ignition on. Check for 12 volts at each injector connector. If 12 volts is present at each injector connector, go to next step. If 12 volts is not present at each connector, repair wiring as necessary.
  3. Using DVOM, check injector resistance. Replace injector if resistance is not about 12-16 ohms at 68°F (20°C). Repeat step 1). If results of step 1) are okay, go to FUEL INJECTOR LEAKAGE TEST. If injector resistance is within specification, go to FUEL INJECTOR LEAKAGE TEST.
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