Summit L4-1597cc 1.6L DOHC (1990)
Fuel Injector: Testing and Inspection
Injector Locations
To test the Injectors, located between the fuel rail and the head, proceed as follows.
Injector Audio Test
AUDIO PERFORMANCE TEST:
Using a stethoscope, check the operational sound (click) made by the injectors (one at a time) during idle or cranking. Check that the sound is produced
at shorter intervals as the engine speed increases.
NOTE: Other injectors may produce sound as they operate even if the injector under checking does not operate. Ensure that the sound from an
adjacent injector is not being transmitted along the delivery pipe to an inoperative injector.
Injector Resistance Test
RESISTANCE MEASUREMENT BETWEEN TERMINALS:
1.
Disconnect the connector for the injector.
2.
Measure the resistance between the terminals.
Resistance:
13-16 ohms at 20°C (68°F)
NOTE: If an injector fails to click while passing the terminal resistance test, it is likely due to a power loss.
