Fuel Injector On-Vehicle Inspection

Fuel Injector On-Vehicle Inspection
1) Remove engine cover.





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





3) Disconnect coupler from injector, connect ohmmeter between terminals of injector and check resistance.
Resistance of injector: 10.8 - 13.2 Ohms at 20°C, 68°F
If resistance is out of specification, replace.
4) Connect coupler to injector securely.
5) Install engine cover.