What causes the vibration of the new Sylphy in D gear when stationary?
3 Answers
If the transmission was previously disconnected in neutral and then connected after shifting to D gear, slight vibration is a normal phenomenon; if the vibration is severe, it may be due to spark plug issues, and it is recommended to have it checked at a service center. The following is an introduction to the new Sylphy: 1. Configuration: The new Sylphy is a main sales contributor for Dongfeng Nissan. The central control features a 7-inch touchscreen + basic button design, integrating Carplay functionality, and systems such as Bluetooth calls and multimedia can also be operated through it. The newly added 2019 Intelligent Connect version is equipped with Dongfeng Nissan's self-developed "Intelligent Connect+" system, which includes intelligent voice control, full-time in-car navigation, remote real-time monitoring, 24-hour entertainment, in-car Wi-Fi hotspot, and worry-free data usage. 2. Powertrain: The new Sylphy adopts a combination of a 1.6L naturally aspirated engine and a CVT continuously variable transmission, with a maximum power of 93kW (126PS) and a maximum torque of 154N·m. There is also a 1.8L naturally aspirated engine option, with a maximum power of 102kW (139PS) and a maximum torque of 174N·m/3600rpm, also paired with a CVT continuously variable transmission.
Regarding the phenomenon of the new Sylphy shaking in D gear while stationary, I have encountered similar issues with this car, which may be caused by several reasons. Firstly, unstable engine idling is a common factor, including uneven ignition due to aging spark plugs or impurities in the fuel system clogging the injectors, affecting the stable combustion of the air-fuel mixture. Secondly, the torque converter in the transmission is in a semi-engaged state in D gear; if its internal clutch is worn or the fluid is dirty, it can cause vibrations that are transmitted to the body. Additionally, if the engine mounts (commonly known as engine mounts or rubber mounts) are aged or damaged, their shock-absorbing function fails, amplifying engine vibrations. The shaking is more noticeable when the vehicle is first started, possibly due to poor fuel flow at low temperatures. It is recommended to first check the condition of the spark plugs and throttle body carbon buildup. If the problem persists, it is best to visit a 4S store for a computer scan diagnosis to avoid delays that could affect driving safety. Regular maintenance, such as replacing the air filter, can reduce the risk.
The D-gear parking vibration issue with the new Sylphy is quite annoying, and my car has experienced this as well. The most common cause is aging or damage to the engine mount bushings, which bear greater torque in D-gear. Once cracked or deformed, vibrations are directly transmitted to the chassis. Problems with the ignition coil or spark plugs may also lead to unstable idling and rough engine ignition. Another potential issue could be a faulty torque converter in the transmission, which is designed to maintain partial load in D-gear. If the internal blades get stuck, the vibration becomes quite noticeable. Clogged fuel pumps or fuel lines can also cause poor fuel delivery, resulting in vibrations. I recommend first checking simpler components, such as the condition of the spark plugs or replacing the fuel filter. If the vibration is severe, it's best to have a professional shop diagnose it to avoid potential issues during long-distance driving. Additionally, avoiding prolonged stationary idling in D-gear in daily use can help extend the lifespan of these components.
