Fuel Charging and Controls
WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
The fuel charging and controls system consists of the:
- Electronic throttle body.
- Fuel injectors.
- Fuel charging wiring.
- Fuel rail.
- Injection pressure (IPR) sensor.
- Fuel pump relay.
The fuel rail:
- Delivers fuel to the individual fuel injectors.
- Receives fuel from the fuel supply tube.
The fuel injectors:
- Are electrically operated by the powertrain control module (PCM).
- Atomize the fuel as the fuel is delivered.
- Are deposit-resistant.
- Each have an internal solenoid that opens a needle valve to inject fuel into the lower intake manifold.
The injection pressure sensor:
- Maintains constant fuel pressure throughout the fuel system and to the fuel injectors.
- Is spring-loaded and operated by intake manifold vacuum.
The fuel pump relay engages the fuel pump when energized by the PCM.
The electronic throttle body:
- Controls air supply to the upper intake manifold by electronically positioning the throttle plate.
- Is not adjustable.
- Cannot be cleaned.