What are the reasons for the weak acceleration and starting performance of the JAC M3?
2 Answers
Specific reasons are introduced as follows: 1. Poor fuel quality: The use of low-quality fuel in the car can also affect the service life of the exhaust system's three-way catalytic converter. If the three-way catalytic converter is clogged, it will directly impact the vehicle's acceleration performance and also lead to increased fuel consumption, resulting in weak acceleration. It is recommended to refuel at nationally certified gas stations to ensure the fuel meets the vehicle's standards and avoid refueling at unlicensed stations. 2. Check the intake system: When experiencing weak acceleration, the first step is to determine if the intake system is intact. If it is, consider whether the intake system needs cleaning. Remove the air filter and blow out the dust. If it is difficult to clean, replace it. Check if the throttle body is clean, and further inspect the intake valve and intake manifold, performing appropriate cleaning if necessary.
I've been driving a JAC M3 for eight years, and the lack of power during acceleration is mostly due to engine system issues. The most common problem is excessive carbon buildup on the throttle valve, which affects air intake efficiency, making the car feel sluggish when starting. For the fuel system, check if the fuel filter is clogged and whether the fuel injectors need cleaning, as these directly impact atomization efficiency. Spark plug aging is another critical factor—leaky ignition coils or faulty ignition coils can also cause weak acceleration. A dirty air filter restricting airflow can make the engine struggle. Clutch slippage is particularly common, especially noticeable when climbing hills or under heavy loads. I remember last time my car had this issue, replacing the clutch disc fixed it. Additionally, not changing the transmission oil for too long can affect power delivery. In short, it's best to get a comprehensive inspection at a professional shop for these issues.
