Electronic Engine Controls

Most of the Lightning engine electronic controls are similar to that of the non-supercharged 5.4L engine. These components are as follows:
^ Crankshaft Position (CKP) Sensor
^ Throttle Position (TP) Sensor
^ Idle Air Control (IAC) Valve
^ Mass Air Flow (MAF) Sensor
^ Intake Air Temperature (IAT) Sensor-Air Cleaner
^ Heated Oxygen Sensors (HO2S)

There are also three controls that are unique to the Lightning. These are as follows:
^ Barometric Pressure (BARO) Sensor
^ Intake Air Temperature (IAT) Sensor-Manifold
^ Supercharger Bypass Vacuum Solenoid
^ Supercharger Bypass Vacuum Solenoid-Actuator

Supercharger Bypass Vacuum Solenoid and Actuator
The Supercharger Bypass Vacuum Solenoid will bleed off boost during sudden throttle closing. This prevents damage that can occur if the throttle is quickly closed while the engine is still under heavy boost. The solenoid is located on the upper LH side of the engine. The solenoid uses engine vacuum to operate a actuator and linkage that connects to the pressure bleed off valve. The actuator is located near the solenoid and is connected to it by a vacuum line.

Barometric Pressure (BARO) Sensor
The BARO sensor is located on the upper LH side of the engine and is used to measure current barometric pressure.

Intake Air Temperature (IAT) Sensor-Manifold
The IAT sensor located in the manifold is located in the rear of the intake manifold, behind the supercharger. This additional sensor is needed due to the increase in air temperature caused by the supercharger's compressing of the intake air.