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Air-Fuel Ratio


The amount of air in proportion to the amount of fuel is known as the air-fuel ratio. The engine cannot perform efficiently if the fuel is too much or too little to the air volume. In most cases, the fuel-to-air ratio of a gasoline engine must be just correct to ensure good combustion in the cylinders. A suitable air-fuel ratio is crucial because the amount of air-fuel mixture drawn into the cylinders determines engine power performance.