Why does the Nissan Tiida experience jerking during startup?
2 Answers
Nissan Tiida's jerking during startup may be caused by factors such as automatic transmission throttle acceleration upshifting, damaged solenoid valves, or high transmission temperature. The details are as follows: Automatic transmission throttle acceleration upshifting causing jerking: Jerking during startup in an automatic transmission car is a normal phenomenon. If you want to accelerate sharply while driving, you need to press the throttle deeply. At this time, the automatic transmission will automatically downshift to increase the engine speed. When the speed reaches a certain level, it will upshift. After upshifting, the speed will drop significantly, resulting in a relatively noticeable jerking sensation. Damaged solenoid valves: Damaged solenoid valves are an important cause of jerking. The sensation of jerking is like being kicked in the backside. Jerking can be occasional or occur at fixed intervals. The distinction is simple: occasional jerking happens without any pattern, while fixed jerking occurs at a certain speed or during a specific gear shift (e.g., from 2nd to 3rd gear) or at a fixed speed. High transmission temperature: High transmission temperature can degrade the quality and friction characteristics of the automatic transmission fluid, increasing friction and wear, which leads to transmission noise. At the same time, sludge (impurities or dirt) can form inside the transmission (e.g., in the valve body), causing the transmission to jerk or experience impacts.
I've been driving my Tiida for over five years, and the jerky start-up is a common issue. The aging CVT fluid in the automatic transmission is a main cause. Insufficient fluid viscosity can lead to belt slippage and poor power transfer. If the clutch is worn, power delivery during the semi-engaged state can be jerky. There are also ignition system problems—spark plug carbon buildup or ignition coil leakage can cause intermittent engine misfires. Worn engine mounts can also exacerbate vibration transmission, especially noticeable during cold starts. I recommend first checking the transmission fluid color—it should be bright red; if it's black, it needs changing. Then have a mechanic read the fault codes to see if there are any indications like P0171 (system too lean). Regular throttle body cleaning can also improve this issue—don't wait until the jerking becomes severe to address it.
