Section 03-04A: Fuel Charging and Controls, 4.9L Engine | 1996 Vehicles Equipped with 4.9L SFI Engines Workshop Manual |
The fuel injectors (9F593) are electromechanical devices which both meter and atomize fuel delivered to the engine. The fuel injectors are mounted in the lower intake manifold (9424) and are positioned so that their tips are directing fuel just before the engine intake valves (6507). The valve body consists of a solenoid-actuated valve assembly, therefore, fuel flow to the engine is regulated only by how long the solenoid is energized. An electrical signal from the powertrain control module (PCM) (12A650) activates the solenoid, causing the needle to move inward, off the seat, allowing the fuel to flow through the orifice. Atomization of the fuel is obtained by director/metering plate at the point where the fuel separates.
| Item | Part Number | Description |
|---|---|---|
| 1 | — | Supply Manifold O-Ring (Part of 9F593) |
| 2 | — | Integral Filter (Part of 9F593) |
| 3 | — | Coil (Part of 9F593) |
| 4 | — | Armature (Part of 9F593) |
| 5 | — | Washer (Part of 9F593) |
| 6 | — | Lower Intake Manifold O-Ring (Part of 9F593) |
| 7 | — | End Cap (Part of 9F593) |
| 8 | — | Stainless Steel Valve Body (Part of 9F593) |
| 9 | — | Stainless Steel Needle (Part of 9F593) |
| 10 | — | Electrical Connector (Part of 9F593) |