Fuel Injector: Testing and Inspection
INSPECTION1. INSPECT FUEL INJECTOR ASSEMBLY
a. Inspect the injector resistance.
1. Using an ohmmeter, measure the resistance between the terminals.
Resistance: 13.4 to 14.2 Ohms at 20°C (68°F)
If the resistance is not as specified, replace the injector.
b. Inspect the injector operation.
CAUTION:
- This test involves high-pressure fuel and electricity.
- Take every precaution to ensure safe handling of both the fuel and electricity.
- Perform this test in a safe area, and avoid any sparks or flame.
- Do not smoke.
1. Pull out the connector from a new fuel tube.
HINT: Part No. 23901-21060
2. Connect SST and the fuel tube connector to the fuel pipe.
SST 09268-41047 (95336-08070)
CAUTION: After taking the precaution, connect the fuel tube connector (quick type)
3. Install the grommet and O-ring to the injector.
4. Connect SST (union and hose) to the injector, and hold the injector and union with SST (clamp).
SST 09268-41047 (95336-08070, 09268-41110, 09268-41300), 09842-30080
5. Put the injector into a graduated cylinder.
HINT: Install a suitable vinyl tube to the injector to prevent or contain the gasoline spray.
6. Operate the fuel pump.
Injection Volume:
7. Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
SST 09842-30080
NOTE: Always do the switching at the battery side. If the injection volume is not as specified, replace the injector.
c. Inspect the leakage.
1. In the condition above, disconnect the test probes of SST (wire) from the battery and check the fuel leakage from the injector.
Fuel drop: 1 drop or less in 12 minutes