Test 9: Fuel Injector Inspection

FUEL INJECTOR INSPECTION CHART

TEST 9		FUEL INJECTOR INSPECTION
STEP	INSPECTION		ACTION
1	LISTEN FOR INJECTOR OPERATION Warm up engine and run at idle (or cranking if engine will not start). Listen for "clicking" sound from the injectors (use stethoscope if necessary). Are all injectors "clicking"?	Yes	GO to step 3.
1		No	GO to the next step.
2	CHECK INJECTOR RESISTANCE Disconnect suspect injector connectors. Measure resistance of injectors. Is resistance between 11-18 ohms (20°C (68°F))?	Yes	CHECK injector driver circuits from PCM.
2		No	INSTALL a new injector(s). See FUEL RAIL REMOVAL/INSTALLATION - 2.5L or FUEL RAIL REMOVAL/INSTALLATION - 3.0L . GO to the next step.
3	CHECK INJECTORS FOR FUEL LEAKAGE Remove fuel rail assembly from intake manifold. WARNING: Before carrying out the following operation, release the fuel pressure from the fuel system to reduce the possibility of injury or fire. See FUEL SYSTEM PRESSURE RELEASE . Connect fuel lines. Remove the fuel pump relay. Install jumper wire between DLC terminal FP and ground. Key ON, engine OFF (KOEO). Check for fuel leaks from injectors. Is fuel leakage less than 1 drop per 2 minutes?	Yes	Fuel injectors are not leaking.
3		No	REMOVE leaking injector. See FUEL RAIL REMOVAL/INSTALLATION - 2.5L or FUEL RAIL REMOVAL/INSTALLATION - 3.0L . CHECK for leaking O-rings and fuel rail damage. REPAIR or REPLACE as necessary.