Crankshaft Position Sensor

The crankshaft position sensor is mounted on the bottom of the DIS ignition module or near to the ignition module. See Figure The sensor protrudes into the engine block and is mounted within .050" (1.3 mm) of the crankshaft reluctor. Sensor position is not adjustable.

The reluctor is a special piece of metal cast with the crankshaft. It has 7 slots machined into it, 6 of which are equally spaced (about 60 degrees apart). A seventh slot is spaced about 10 degrees from one of the other slots and generates a synchronization pulse signal. As reluctor rotates, the slots change the magnetic field to the sensor, creating an induced voltage.