Fuel Injectors

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

Four fuel injectors are located between the cylinder head and the fuel rail. The injectors are sealed in the cylinder head with O-ring seals and held in position by the fuel rail.

The ECM supplies the power and ground for each injector. The ECM operates the injectors by supplying power and ground signals to the solenoid valves in the injector. When the signals are applied the solenoid valve operates and the injector sprays pressurized fuel from the fuel rail directly into the cylinder. The amount of fuel injected and the timing of the injection period is controlled by the ECM using data from other sensors. The ECM can monitor the injector operation by monitoring both lines to the injector. Each injector can be diagnosed by the ECM and fault codes stored. The codes can be read using a Jaguar approved diagnostic system.

If a fuel injector fails, the engine will suffer from unstable idle speed, poor NVH (noise, vibration and harshness) and poor emissions performance. The engine MIL (malfunction indicator lamp) in the IC will also be illuminated.