REMOVAL AND INSTALLATION
It is recommended to replace all gaskets and O-rings on disconnected fuel system components. Read the procedure first to ensure that you will have the necessary parts to complete the repair.
- Disconnect the negative battery terminal from the battery. Remove the air cleaner.
- Properly relieve the fuel system pressure.
- Unplug the electrical connectors at the injectors by squeezing the two tabs together and pulling it straight up.
See Figure 1
- Remove the fuel meter cover.
When removing the fuel meter cover screws, note the location of the two short screws.
- Using a small pry tool and support bar, carefully pry up on the injector until it is free from the fuel meter body.
- Remove the lower small O-ring from the nozzle end of the injector and discard.
- Discard the fuel meter cover gasket.
- Remove the upper, large O-ring from the top of the injector cavity and discard.
See Figure 2
- Lubricate the new upper (large) O-ring with clean engine oil, and install in the counterbore of the fuel meter body. Make sure it is seated properly.
- Lubricate the new lower (small) O-ring with clean engine oil, and install on the nozzle end of the injector. Push the O-ring on far enough to contact the filter.
Install the fuel injector as follows:
- Align the raised lug on the injector base with the notch on the fuel meter body cavity.
- Push down on the injector until it is fully seated in the fuel meter body.
The electrical terminals of the injector should be parallel with the throttle shaft.
See Figure 3
- Install the fuel meter cover assembly.
- Install the electrical connectors to the injectors.
- Connect the negative battery cable.
- Turn the ignition switch to the ON position for 2 seconds then turn to the OFF position for 10 seconds. Again turn the switch to the ON position and check for leaks.
- Install the air cleaner assembly.
- Ensure that the vehicle's ignition system is operating properly.
- Perform a fuel pump test to ensure that fuel is getting to the injectors.
- Remove the air cleaner assembly.
- Have an assistant crank the engine and observe the fuel injectors.
- There should be a fuel spray below the injectors, into the throttle body.
If there is no fuel spray coming from the injectors, perform the following steps:
- Turn the ignition switch OFF .
- Detach the electrical connector(s) from the fuel injector(s).
- Attach a suitable test light to the A terminal of each harness and to ground.
- Crank the engine and observe the test light.
- If the light blinks, the injector is probably faulty. Replace the injector with a known good one and repeat the tests.
- If the light fails to blink, there is a problem with the wiring harness or engine control module.
If fuel sprays from the injector, perform the following steps:
- Turn the ignition OFF .
- Detach the electrical connector(s) from the injector(s).
- Crank the engine and observe any fuel spray or drip from the injector.
- If there is no fuel spray or drips from the injectors, the injectors are fine.
- If fuel spray or drips are visible, the injectors are leaking internally and must be replaced.