What are the reasons for decreased power and increased fuel consumption?

[StOlivia]

The reasons for decreased power and increased fuel consumption are as follows: 1. Fuel system issues: When the vehicle's power significantly decreases, it may be caused by fuel injection problems or poor atomization in the fuel system. In severe cases, it might even prevent the vehicle from starting. These issues are primarily due to excessive carbon buildup in the fuel injectors, which blocks the injector needle valve, leading to poor fuel injection or atomization. 2. Electrical system issues: Electrical problems mainly include wiring issues and spark plug problems. When there are wiring problems, it can affect the operation of certain sensors, which may also lead to these symptoms. Additionally, spark plug issues, such as excessive carbon buildup and aging, can also cause insufficient vehicle power. 3. Intake system problems: When the vehicle's intake system malfunctions, it results in insufficient air intake, preventing enough oxygen from mixing with fuel for complete combustion. This not only increases fuel consumption but also affects the vehicle's power.