Fuel Injector: Service and Repair

REMOVAL

1. Remove intake manifold.

2. Disconnect negative battery cable.

NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the adaptive strategy.

3. Remove fuel tank filler cap and release fuel tank pressure.

4. Release pressure from fuel system.

5. Disconnect connectors from fuel charging wiring at fuel injectors.

6. Remove fuel injection supply manifold retaining bolts.

7. Raise and slightly rotate fuel injection supply manifold and remove fuel injectors.

INSTALLATION

1. Inspect fuel injector O-ring seals and insulators for damage or deterioration.

2. Lubricate fuel injector O-rings with clean engine oil.

3. Install fuel injectors in fuel supply manifold. Lightly twist and push fuel injectors into position.

4. Install fuel injection supply manifold, ensure fuel injectors seats properly in cylinder head.

5. Install fuel injection supply manifolds retaining bolts.

6. Connect fuel charging wiring at fuel injectors.

7. Install intake manifold.

8. Connect negative battery cable.

9. Turn ignition ON and OFF several times without starting engine and check for fuel leaks.