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Summary of change:
Ford Sierra Cosworth 2wd Originally with Weber-Marelli engine management. System component: The distributor The dristibutor is driven by the auxiliary shaft as on the standar ohc engine. A phase sensor , locatoed opposite a cam having two teeth separated at 90° to each other, is fitted inside the distributor. At the passing of a tooth the sensor delivers a signal to the ECU. This signal is similar to the signal supplied by an RPM/TDC sensor fitted at the crankshaft pulley. Both te signal from the distributor and the RPM/TDC sensor enable module to idetify the phase of each cylinder. Ignition module The ECU sends a Spark-out signal to the ignition module to trigger an H.T. pulse by switching the coil primary circuit off.
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