Fuel Injector: Service and Repair

REMOVAL

1. Release pressure from fuel system at fuel pressure relief valve (schrader) on fuel rail assembly.

2. Remove upper intake manifold.

3. Remove fuel supply manifold.

4. Carefully remove electrical harness connectors from individual injectors.

5. Remove injector retaining clips.

6. Grasping injector body, pull up while gently rocking injector from side to side.

Fuel Injector:

7. Inspect injector O-rings (two per injector) for signs of deterioration.

8. Inspect injector "plastic hat" (covering the injector pintle) and washer for signs of deterioration. Replace as required. If hat is missing, look for it in intake manifold.

INSTALLATION

1. Lubricate new O-rings with light grade oil and install two on each injector.

NOTE: Never use silicone grease. It will clog the injectors.

2. Install the injectors using a light, twisting, pushing motion.

Fuel Injection Supply Manifold And Related Components:

3. Install fuel supply manifold. Replace retainer clips if distorted.

4. Install electrical harness connectors to injectors.

5. Install upper intake manifold.

6. Install the fuel filler cap.

7. Turn ignition on and off several times without starting engine to pressurize the fuel system. Check for fuel leaks at pressure regulator, fuel injectors and fuel connect fittings.

8. Start engine and warm to operating temperature. Check for leaks.