Abnormal car jitter in winter may involve many factors. The following are the main reasons:
First of all, engine mechanical failure is a common cause. In the long-term use process, due to the uneven pressure of each cylinder, the ignition gap and time control of the spark plug may be different, resulting in unstable engine operation and vehicle jitter.
Secondly, the failure of the air intake system can not be ignored. Air leakage in the intake pipe, too much carbon deposit in the intake valve and intake pipe, and too much dirt on the inner wall of the throttle valve and intake pipe may all affect the smoothness of air flow, cause the imbalance of mixture ratio, make the engine work abnormally, and then lead to vehicle jitter.
In addition, the failure of the engine management system may also be an important factor. For example, incorrect water temperature, intake air temperature signal or line fault may lead to inaccurate engine control and vehicle jitter.
The failure of the ignition system can not be ignored. After long-term use, the spark plug, ignition coil, fuel nozzle and other components will be worn out, resulting in poor ignition or poor fuel injection, resulting in unstable engine combustion, which will lead to vehicle jitter.
Finally, the failure of the oil supply system may also be a cause. For example, too much colloidal carbon deposit in the fuel nozzle may cause the nozzle to be closed loosely or blocked, resulting in poor fuel supply or unstable fuel supply pressure, resulting in abnormal engine operation and vehicle jitter.
To sum up, the causes of severe automobile jitter in winter may involve engine mechanical failure, air intake system failure, engine management system failure, ignition system failure and oil supply system failure. In order to ensure the normal operation and driving safety of the vehicle, it is suggested that the vehicle should be inspected and maintained in time.