How to replace lean burn system?

To replace a lean burn system, first, identify the components that need replacement, such as the air-fuel ratio sensors, fuel injectors, or ECU tuning. Ensure that the new system is compatible with your vehicle and meets emissions regulations. Follow the manufacturer's instructions for installation, which typically involves disconnecting the battery, removing the old components, and installing the new ones. Finally, recalibrate the engine control unit if necessary to optimize performance and efficiency.