Sync Pulse Signal Generator (Stator)
The sync pulse signal generator is located in the distributor and works in conjunction with the engine speed sensor to provide the ECU with input to establish and maintain correct injector firing order. See Fig 1 . A pulse ring mounted to the distributor shaft references the position of pistons one and six as it rotates through the sync pulse signal generator's magnetic field.
The pulse ring rotates through the sync pulse signal generator for l80°. When the leading edge of the pulse enters the sync pulse signal generator, the magnetic field becomes weaker. This indicates the position of piston number one to the ECU. When the trailing edge of the pulse ring leaves the sync pulse signal generator, the magnetic field becomes stronger. This indicates the position of piston number six.
The sync pulse signal input and engine speed sensor input allow the ECU to establish the necessary reference point to synchronize the fuel injection.