What are the reasons for the increasing fuel consumption of Honda Civic?
3 Answers
Engine carbon deposits, spark plug failure, abnormal tire pressure, and poor fuel injector atomization can all lead to increasing fuel consumption in the Honda Civic. Engine carbon deposits: During long-term operation of the car, gasoline inevitably produces carbon deposits and sludge during combustion. If these sludge and carbon deposits are not cleaned in time, it will lead to increased fuel consumption. Spark plug failure: The function of the car spark plug is to use high-voltage electricity to generate sparks to ignite the air-fuel mixture. If damaged, it will reduce the ignition energy, causing uneven combustion of the mixture, which will slow down the acceleration of the car and increase fuel consumption. Abnormal tire pressure: Abnormal tire pressure can also affect the fuel consumption of the car. When the tire pressure is too low or the tread is severely worn, the contact area between the tire and the road surface increases, friction increases, rolling resistance increases, and fuel consumption naturally becomes higher. Poor fuel injector atomization: This situation occurs when the car's fuel injector is clogged, greatly affecting its performance, which also leads to increased fuel consumption. Solutions for the increasing fuel consumption of Honda Civic: It is necessary to clean the engine carbon deposits, replace or clean the spark plugs, check the tire pressure and replenish it in time, and replace the fuel injector.
My Honda Civic has been running for over three years, and recently the fuel gauge has been dropping unusually fast. I found that carbon buildup is a major issue, especially when the throttle body and fuel injectors get clogged—the engine has to work harder and inject more fuel to maintain power. Worn-out spark plugs cause unstable ignition, leading to incomplete fuel combustion and wasted gasoline. Underinflated tires are another problem; last time I checked, the tire pressure was 15% below the standard, increasing rolling resistance and fuel consumption. The air filter, unchanged for half a year, was clogged with dust, restricting airflow and forcing the engine to consume more fuel. Now, I clean carbon deposits every 5,000 kilometers, check tire pressure regularly, and my fuel consumption has finally returned to normal levels.
I've personally experienced the Civic's fuel consumption creeping up. When oxygen sensors age, their readings become inaccurate, causing the engine to inject excess fuel. If the air-fuel ratio gets thrown off, you end up burning fuel for three kilometers that should only cover two. Aging batteries are silent culprits too—the alternator works harder to recharge them, indirectly consuming more fuel. During every maintenance check, I make sure to inspect the ignition coils thoroughly, as any leakage would directly compromise combustion efficiency. I remember once forgetting to change the oil before a long trip—the thickened old oil made the engine struggle, adding an extra liter per 100 kilometers. Now I've developed the habit of checking sensor status every three months.
