Most people driving modern cars are not getting all they could out of the engine. The engine management system, or ECU, uses stock data provided by the vehicle manufacturer and this will not be providing the best possible use of the engine. This means that with an ECU flash it is possible to get better performance from your car as well as a number of other benefits such as improved mpg figures and a more enjoyable driving experience.
An ECU flash can often be done using the engine diagnostic port on the car and by using the appropriate computer and software. It is not advised that owners try this themselves, however, because if they get it wrong then it can prevent the car from running properly until a professional ECU flash is completed.
When you ECU flash your car you typically do so for improved performance. Flat spots can be removed from acceleration through the gears. Whenever you put your foot down you will enjoy increased responsiveness following remapping and this not only delivers a smoother drive it also gives you greater ability to pull away from the lights without hesitating and it enables you to overtake more safely and quicker.