What Are the Reasons for Increasing Car Fuel Consumption?

2 Answers
JosephRose
07/25/25 1:33pm
Car fuel consumption is increasing for the following reasons: 1. After cleaning the throttle body, the engine control unit was not matched or the matching was unsuccessful, leading to higher fuel consumption. 2. A fault in the engine's electronic control system causes an overly rich air-fuel mixture, resulting in increased fuel consumption. 3. Damage to the engine's ignition coils or spark plugs, or fuel injector leaks, leads to higher fuel consumption. 4. A malfunction in the engine cooling system causes the engine temperature to remain too low, keeping it in a warm-up state. 5. Excessive carbon buildup in the engine leads to incomplete combustion. 6. A fault in the fuel tank ventilation system causes fuel vapor leaks.
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McAlan
08/11/25 8:46pm
Recently, I've also noticed that my car's fuel consumption is getting higher and higher, which is related to my previous driving habits. I used to love accelerating aggressively, stomping the gas pedal to the floor at red lights. Looking back now, that was really wasteful. On the highway, speeding over 120 km/h creates huge wind resistance, and the fuel gauge drops rapidly. Also, constantly braking in traffic jams and restarting consumes a lot of fuel. I've tried changing my habits, like accelerating smoothly and predicting road conditions in advance to slow down gradually. Now, my fuel consumption has improved significantly. When using the air conditioning, especially in summer, it makes the engine work harder, increasing fuel consumption by at least 10%. I recommend everyone check their driving habits first—saving fuel also saves money.
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