E 150 V8-4.6L SOHC VIN W (2004)
Crankshaft Position Sensor: Description and Operation
CRANKSHAFT POSITION SENSOR (INTEGRATED IGNITION SYSTEMS)
Three Different Types Of Crankshaft Position (CKP) Sensors
The crankshaft position (CKP) sensor is a magnetic transducer mounted on the engine block or timing cover and is adjacent to a pulse wheel located on
the crankshaft. By monitoring the crankshaft mounted pulse wheel, the CKP is the primary sensor for ignition information to the powertrain control
module (PCM). The trigger wheel has a total of 35 teeth spaced 10 degrees apart with one empty space for a missing tooth. The 6.8L ten cylinder pulse
wheel has 39 teeth spaced 9 degrees apart and one 9 degree empty space for a missing tooth. By monitoring the trigger wheel, the CKP indicates
crankshaft position and speed information to the PCM. By monitoring the missing tooth, the CKP is also able to identify piston travel in order to
synchronize the ignition system and provide a way of tracking the angular position of the crankshaft relative to fixed reference (Figure 31).
