Fuel Injector: Testing and Inspection

Injector Tests

NOTE: Before removing any of the injectors, remove and examine the spark plugs, check for consistent colouration of plugs. A leaking injector will result in the appropriate spark plug being 'sooted up'.


The following test may only be carried out using suitable injector test equipment

Leak Test
Leak test with the injectors closed but pressurise to 2.54 Kgf/sq cm. No injector should leak more than 2 drops of fuel per minute.

Fuel Delivery Test
Fuel delivery test with the injector open and pressurised as above, fuel delivery from each injector should be 160 - 175 cc per minute using white spirit, or 180 - 195 cc per minute using petrol at 20 °C ± 2 °C.