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ECU European Unit, former codename for the now-Euro. An acronym for: http://www.cowan.edu.au/ The ECU or Engine Control Unit is a computer in an automobile which performs engine management tasks, controlling its operation. They are most commonly identified with electronic fuel injection or EFI, which cannot be performed without them. Since the widespread adoption of the OBD-II standard in 1996 the ECU is officially referred to as the powertrain control module, or PCM. Duties Depending on the car s capabilities, the ECU may have any of a long list of goals. In the typical car with a limited set of features, the ECU controls fuel delivery, timing advance, and the anti-smog equipment. As RPMs increase, it will increase timing; When the pedal is pressed down significantly further than the current speed would signify, it increases fuel and air delivery in order to provide more speed, and sometimes advances the timing still further to add power. If the knock sensor detects de

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