Fuel Injector: Testing and Inspection

On-Vehicle Inspection
1. With battery negative cable disconnected, disconnect injector coupler.





2. Connect ohmmeter to each injector terminal and measure resistance.

Resistance of injector: 0.5 - 1.5 ohms at 20°C (68°F)

If resistance is out of specification, replace fuel injector.
3. Connect injector coupler.
4. Remove air cleaner assembly without disconnecting IAT sensor coupler.





5. Check that fuel is injected out in conical shape from fuel injector when cranking or running engine. If no fuel is injected, check wiring harness for continuity and couplers for proper connection referring to "Diagnostic Flow Chart B-1".





DIAGNOSTIC FLOW CHART B-1

- If fuel is not injected out in conical shape, replace injector.
6. Check injector for fuel leakage after injection is stopped (i.e., after cranking or engine stop). Replace if leakage exists.

Fuel leakage: Less than 1 drop/min

7. Install air cleaner assembly.

Off-Vehicle Inspection
Check fuel injector filter for evidence of dirt and contamination. If present, clean and check for presence of dirt in fuel lines and fuel tank.