Fuel Injector: Testing and Inspection

FUEL INJECTOR

1. Disconnect fuel injector harness electrical connectors and measure resistance across the terminals. Resistance should be 2-3 ohms.
2. If measured resistance is not as specified, replace injector.
3. Check fuel injector operating noise using a suitable metal bar or stethoscope with engine running.
4. If a regular click is heard which varies with engine speed, proceed to step
5. If a regular click is not heard, replace injector.


DROPPING RESISTOR






Measurement of resistance

1. Disconnect dropping resistor wiring at connector
2. Measure the resistance across the center terminal of the dropping resistor side connector and other terminals. Standard Resistance = 5 - 7 Ohms.
3. If any one of the measurements deviates from the standard value, the dropping resistor assembly must be replaced.