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YES... there is the 3X crankshaft position sensor and there is the 24X crankshaft position sensor. Here is some information about the 24X crankshaft position sensor from alldata.
|24X Crankshaft Sensor Installation |
The 24X crankshaft sensor is used to improve idle spark control at engine speeds up to approximately 2000 rpm. OPERATION
The 24X crank sensor contains a Hall-effect switch. The magnet and hall-effect switch are separated by an air gap. The Hall-Effect switch reacts like a solid-state switch, grounding a low current signal voltage when a magnetic field is present. When the magnetic field is shielded from the switch by a piece of steel placed in the air gap between the switch and the magnet, the signal voltage is not grounded. If the piece of steel is repeatedly moved in and out of the air gap, the signal voltage will appear to cycle. The piece of steel is the interrupter ring mounted to the rear of the crankshaft balancer.
Each interrupter ring has blades and windows that, with crankshaft rotation, either block the magnetic field or let it pass to one of the Hall-effect switches. The Hall-Effect switch is called the 24X crank sensor because this interrupt ring has 24 evenly spaced blades and windows which are all the same width. The 24X crank sensor produces 24 "ON-OFF" pulses per crankshaft revolution. The hall-effect switch closest to the crankshaft, the 3X crankshaft sensor, is so called because the interrupter ring has a special wheel cast on the crankshaft that has seven machined slots, six of which are equally spaced 60°apart. the seventh slot is spaced 10°from one of the other slots. As the interrupter ring rotates with the crankshaft, the slots change the magnetic field. This will cause the 3X hall-effect switch to ground the 3X signal voltage supplied from the ignition module. The 24X interrupter ring and hall effect switch react similarly. The ignition module interprets the 24X and 3X "ON-OFF" signals as an indication of crankshaft position, and must have both signals to "fire" the correct ignition coil. The ignition coil determines crank position for correct ignition coil sequencing by counting how many 24X signal transitions occur during a 3X pulse. LOCATION
The dual crankshaft sensor, secured in an aluminum mounting bracket and bolted to the front left side of the engine timing cover, is partially behind the crankshaft harmonic balancer. A three wire harness connector plugs into the sensor and connects it to the module.