What are the reasons for the sudden increase in fuel consumption of the Tiguan?
2 Answers
The sudden increase in fuel consumption of the Tiguan requires a detailed analysis of many factors, such as engine displacement, road conditions, driving habits, vehicle load, tire pressure, and oil quality. The specific explanations are as follows: 1. Engine displacement: The larger the engine displacement, the higher the fuel consumption. 2. Road conditions: When a car starts from a stationary state, it requires a large acceleration, and the engine needs to output a lot of power at this time. If the car frequently starts from a stationary state, the fuel consumption will be relatively high. When driving on congested roads, the car's engine is in an idle state for some time. When the engine is idling, the car's mileage does not increase, but the engine continues to consume fuel. Therefore, the fuel consumption per 100 kilometers will also increase. 3. Driving habits: Personal driving habits have a significant impact on fuel consumption. When driving, it is important to keep the car moving at a constant speed as much as possible and to avoid unnecessary overtaking. Only in this way can the car be the most fuel-efficient. 4. Tire pressure: If the tire pressure is lower than the standard pressure, the contact area of the tire will increase, increasing friction. This will not only wear out the shoulders of the tire but also increase fuel consumption. 5. Oil quality: Using poor-quality oil can produce carbon deposits due to unsaturated hydrocarbons and colloidal impurities under high temperatures. This will roughen the intake pipe wall, affecting the intake effect and the quality of the mixture, leading to a sharp increase in fuel consumption.
My Tiguan's fuel consumption suddenly soared to 12L/100km last time, which scared me into going to the repair shop immediately for a check. The mechanic said the most common causes for this situation are insufficient tire pressure and oxygen sensor failure. If the tire pressure is 20% below the standard value, fuel consumption can increase by more than 5%. Another time, it was found that the carbon canister solenoid valve was stuck, causing all the gasoline vapor from the fuel tank to be sucked into the engine and burned. During maintenance, it was also discovered that the electrode gaps of all four spark plugs were too large, resulting in poor ignition efficiency and increased fuel consumption. It's recommended to check the air filter; if it's clogged, it's like running with a mask on—very suffocating. Lastly, don't overlook the viscosity of the engine oil. Using the wrong grade of oil increases engine resistance and also leads to higher fuel consumption.
