Why won't my car move?

[SerenityLee]

Here are explanations for why a car won't move: 1. Reason one: It may be related to or interact with the throttle valve and poor low-temperature fluidity of engine oil. 2. Reason two: Not cleaning the throttle valve for over 7,500 kilometers can lead to excessive dirt accumulation. Carbon buildup in the intake tract, fuel injectors, and intake valves can cause malfunctions. The uneven fuel quality and congested urban road conditions contribute to carbon deposit formation. During cold starts, the fuel sprayed by the injectors is largely absorbed by these deposits, resulting in an overly lean air-fuel mixture that makes starting difficult. 3. Reason three: Not cleaning the fuel system for over 40,000 kilometers can cause excessive dirt inside the fuel pump and fuel lines. 4. Reason four: Not replacing the battery for over 3 years can lead to insufficient voltage during cold starts.