Engine Management
Modern engine management systems do a fine job of ensuring that engines run cleanly and efficiently in a wide variety of conditions.
An ECU is a self-contained custom-built computer which controls the running of an engine by monitoring the engine speed, load and temperature and providing the ignition spark at the right time for the prevailing conditions and metering the fuel to the engine in the exact quantity required.
There are two discrete subsystems in operation within the ECU - the fuel or injection system and the ignition system. It is possible to run an engine management system which just provides one of these subsystems, for example just the ignition system. It is much more common to use the mapped ignition within an ECU in isolation than it is to use just the injection.














