The AFR-64L Lean-Burn Air-Fuel Control System was engineered specifically for lean-burn, spark-ignited natural gas engines. It minimizes engine emissions, maximizes fuel efficiency, and cuts engine maintenance costs – by maintaining the proper air-fuel ratio over varying engine loads, speeds, fuel quality, ambient temperatures and barometric pressures. And the AFR-64L works without operator intervention. Easy to install, even easier to use, and equipped with a comprehensive 44-fault on-board diagnostics and troubleshooting system, the Windows-based AFR-64L redefines the state-of-the-art – in hardware, microprocessor power, control system software, operator interface options, fast response to varying engine conditions, software upgradeability, you name it.