How to Determine if the Car's Air-Fuel Mixture is Too Rich?

1 Answers
Queiroz
07/30/25 4:47am
Automobile air-fuel mixture refers to the combination of fuel (such as gasoline or diesel) and air. There are four main methods to determine if a car's air-fuel mixture is too rich. Below is a detailed introduction to these four methods: 1. Presence of fuel leakage: When there is fuel leakage at the carburetor throttle shaft or gasket, it indicates that the car's air-fuel mixture concentration is too high. 2. Decreased engine power: When the air-fuel mixture is excessively rich, the engine's power decreases while fuel consumption increases. 3. Carbon deposits on electrodes: When removing the spark plug, if wet gasoline and significant carbon deposits are observed on the electrode surface, this indicates an overly rich air-fuel mixture. 4. Unstable engine idle: Decreased engine power accompanied by irregular abnormal noises from the muffler also signifies an excessively rich air-fuel mixture.
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