Why is the vehicle's fuel consumption increasing?

1 Answers
DelMason
07/30/25 9:16am
There are several reasons why a car's fuel consumption may be increasing: 1. After cleaning the throttle body, failure to properly match or unsuccessful matching with the engine control unit can lead to rising fuel consumption. 2. Malfunctions in the engine's electronic control system may cause an overly rich air-fuel mixture, resulting in higher fuel consumption. 3. Damaged engine ignition coils or spark plugs, or leaking fuel injectors can increase fuel consumption. 4. Faults in the engine cooling system may cause the engine temperature to remain too low, keeping it in warm-up mode. 5. Excessive carbon buildup in the engine can lead to incomplete combustion. 6. Malfunctions in the fuel tank ventilation system may cause fuel vapor leaks.
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