Ford FCSD TECHNICAL TRAINING FCS-14000-DL Manuel d'utilisateur télécharger pdf (Page 47)

LESSON 3: POWERTRAIN

VCT System

5.4L Variable Cam Timing Solenoid Electrical Connector

Conventional camshafts are permanently synchronized with the engine crankshaft to operate the intake and

exhaust valves at a specific point in each combustion cycle. Variable Cam Timing (VCT), however, allows the

valves to operate at variable points in the combustion cycle.

•

The VCT system on the 5.4L provides several important benefits:

– Eliminates the need for an EGR system.

– Improved low speed performance (torque) and high-speed operation (horsepower).

– Enhanced idle quality.

– Lower exhaust emissions.

2005 Expedition/Navigator New Model Technician Training 02-SEP-04 3-11

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Ford FCSD TECHNICAL TRAINING FCS-14000-DL Manuel d'utilisateur Page 47