Rio Cinco L4-1.6L DOHC 16V (2003)
Fuel Injector: Testing and Inspection
INSPECTION
CHECK OPERATION
1. Warm up engine and let engine idle.
2. Listen for sound of each injector running by using sound scope or screwdriver.
WARNING: Fuel is explosive. When working on fuel system, make sure to supply adequate ventilation to the work area. Do not smoke, and keep
sparks and open flames away.
CAUTION: Make sure the fuel injectors are firmly seated on the fuel rail to prevent movement and possible damage.
3. If no sound is heard, measure injector resistance.
4. If injector is OK, check wiring to injector and voltages of ECM terminals B03-47, 48, 49, and 50.
FUEL LEAKAGE TEST
1. Remove injectors together with fuel rail.
2. Secures injectors to fuel rail with wire.
3. Connect data link connector terminals FUEL PUMP and B+ with jumper wire.
4. Turn ignition switch ON.
5. Tilt injectors about 60 degrees and verify that no fuel leaks from the injector nozzles.
6. If fuel leaks, replace injector.
7. Turn ignition switch "OFF" and remove jumper wire.
VOLUME TEST
1. Remove injectors together with fuel rail.
2. Secure injectors to distributor pipe with wire.
3. Reconnect injector connectors.
4. Connect jumper wire to injector to ECM wires (BRN) and ground.
5. Turn ignition ON.
6. Inspect injector volume with graduated container.
Injector volume : 1.9 g/sec
If not as specified, replace injectors.
NOTE
When reassembling fuel rail and injectors:
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Use new injector O-rings
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Apply a small amount of clean engine oil to each O-ring before installing.
INJECTOR RESISTANCE
1. Disconnect injector harness.
