Fuel Injector On-Vehicle Inspection

1)Remove air cleaner assembly.  

2)Using sound scope (1) or the like, check operating sound of fuel injector (2) when engine is running or cranking.
Cycle of operating sound should vary according to engine speed.
If no sound or unusual sound is heard, check fuel injector circuit (wire or connector) or fuel injector.

3)Disconnect connector (1) from fuel injector, connect ohmmeter between terminals of fuel injector and check resistance.
If resistance is out of reference value greatly, replace injector.

4)Connect connector to fuel injector securely.

5)Install air cleaner assembly.