what is an ecu?

What is an ecu?

The Engine Control Unit, or ECU, is a computer system that controls the performance of an internal combustion engine. It has a variety of input and output connections to components such as the ignition system, fuel injection system, various sensors, and the exhaust system. The ECU makes decisions about when to ignite the spark plugs, for example, and how much fuel to inject into the cylinders, based on information it receives from the sensors about conditions such as engine speed and temperature.

The ECU can be programmed to maximize fuel efficiency, performance, or emissions depending on the information it is fed from the various sensors. It can be changed or reprogrammed using an aftermarket or 'chipping' kit to improve the car's performance or response. These kits provide a range of preset performance settings, such as economy, sport, and race reprograms, which can be adjusted to your individual requirements.

The ECU has become a more important part of modern car engineering as car manufacturers strive to build more efficient, cleaner cars. On-board diagnostics is made possible by the sensors and other components the ECU is connected to, allowing for quick and easy diagnosis if an issue occurs. It also allows for dynamic control over numerous aspects of the car's performance.