Let’s start with the so-called EGR valve, that is, exhaust gas recirculation. It is found on many models to improve their environmental performance. The main problem of the node is that over time the valve becomes clogged with soot, begins to “stick” and the car stalls when idling or just moving.
Replacing valves is expensive. Therefore, the service “fills in” a new “firmware” so that the engine control module no longer “sees” the EGR. After that, the motor runs without interruption and the valve acts as a simple plug.
In addition, poking around in the firmware is simply necessary when, for example, removing a catalytic converter, switching off urea in diesel engines or removing a particulate filter. All this is done in used cars, which causes a lot of problems for owners. For example, buying an expensive catalytic converter.
Recently, the procedure for increasing the engine idle speed is gaining popularity. Gradually, this is becoming popular with owners of cars with small engines. And since we have crossovers with three-cylinder engines, such a chip tuning is guaranteed success.