What Causes the Jerking During Startup of the Verano?
3 Answers
Buick Verano's jerking during startup is due to reasons such as automatic transmission acceleration and upshifting, damaged solenoid valves, and high transmission temperature. The details are as follows: Automatic Transmission Acceleration and Upshifting: Jerking during startup in an automatic transmission car is a normal phenomenon. If you want to accelerate quickly while driving, you need to press the accelerator 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 again. After upshifting, the speed will drop significantly, resulting in a relatively obvious jerking sensation. Damaged Solenoid Valves: Damaged solenoid valves are an important cause of jerking. The sensation of jerking is like being kicked from behind. Jerking can be divided into occasional and fixed-time occurrences. The distinction is simple: occasional jerking occurs without any pattern, while fixed jerking happens at a certain speed or when shifting between specific gears at a fixed speed. High Transmission Temperature: High transmission temperature can degrade the quality and friction characteristics of automatic transmission fluid, increasing friction and wear. This leads to transmission noise, and sludge, impurities, or dirt can also form inside the transmission, such as in the valve body, causing jerking and impact in the transmission.
I've experienced the jerky start issue several times while driving my Verano. It feels like the car suddenly lurches forward, which can be quite startling. Common causes include potential automatic transmission problems. The Buick Verano uses a dual-clutch transmission that's prone to jerking, possibly due to oil accumulation in valves or worn clutch plates, leading to unstable power output during acceleration. Poor engine combustion can also contribute, such as aging spark plugs or faulty ignition coils causing unstable idle and subsequent jerking. Other factors might be incorrect sensor signals from the ECU (Electronic Control Unit) or driving habits like aggressive throttle input. I'd recommend checking your transmission fluid and maintenance records first - adding some fuel additive significantly improved my own vehicle. For safety, if the jerking is severe, visit a professional repair shop immediately to prevent potential driving hazards.
Haha, I've been driving the Verano for over five years, and the jerky start is quite common, mostly due to minor issues with the engine or transmission. For example, excessive carbon buildup in the engine's intake system can clog the throttle valve, causing uneven combustion of the air-fuel mixture at idle and making the car wobble like a drunkard when starting. It could also be a delay in the TCU control of the automatic transmission—Buick's dual-clutch tends to stutter at low speeds. Additionally, insufficient fuel pump pressure or dirty fuel lines can also cause this. I once experienced it, and changing the spark plugs made it much smoother. The key is regular maintenance—don't wait until symptoms become severe to address them. Safe driving is paramount, as jerky starts increase the risk of rear-end collisions.
