What are the reasons for a sudden increase in fuel consumption in diesel vehicles?
2 Answers
Diesel vehicle fuel consumption suddenly increases due to insufficient tire pressure or tire aging. The following is a detailed introduction to the reasons for a sudden increase in fuel consumption in diesel vehicles: 1. Insufficient tire pressure or tire aging: Low tire pressure increases the contact area between the tires and the ground, leading to greater driving resistance and higher fuel consumption. 2. Clogged air filter: The air filter may be obstructed, reducing air intake and increasing vehicle fuel consumption. 3. Cylinder wear and air leakage: This results in low cylinder pressure, poor combustion efficiency, and increased fuel consumption.
I found that the most common reason for a sudden increase in diesel car fuel consumption is an issue with the engine system. For example, a clogged fuel injection system or leaking fuel injectors can waste a lot of diesel—this sounds technical, but I encounter similar situations every time I repair my car. Also, a dirty air filter reduces air intake, leading to poor combustion efficiency and naturally higher fuel consumption. Sometimes, sensor failures, such as a faulty mass airflow sensor, cause the computer to inaccurately control fuel injection, requiring a diagnostic scan to check for error codes. I remember one time my car's fuel consumption skyrocketed due to leaking fuel injectors, and after fixing it, the fuel efficiency improved immediately. Additionally, don’t overlook low tire pressure, as increased rolling resistance also wastes fuel. Regular maintenance checks on these key components can save a lot of trouble. A dirty fuel filter is another common issue—replacing it often brings fuel consumption back to normal. In short, don’t delay; take it to a professional shop to diagnose the problem, or you’ll end up wasting money and damaging your car.
