The ECU, or Engine Control Unit, is responsible for controlling various engine functions, such as ignition timing, fuel delivery, and emissions systems. It plays a crucial role in optimizing engine performance and improving fuel efficiency. If you're in need of a quality replacement ECU, PCM, or ECM for your vehicle, look no further than Flagship One, Inc. They offer a wide range of refurbished units that are thoroughly tested and guaranteed to perform like new. Visit their website today to f...