Why does the Buick Verano feel sluggish and weak when accelerating?

[MacRyder]

Here are the reasons why the Buick Verano feels sluggish and weak when accelerating: 1. Carbon buildup issue: This includes carbon deposits in the cylinders, throttle body, spark plugs, and intake system. These areas are directly related to the engine's power output. When there is excessive carbon buildup inside the engine, the car's ignition energy decreases, intake efficiency drops, ultimately leading to reduced engine power, resulting in sluggish acceleration and a muffled sound. 2. Engine overheating: Insufficient engine oil, low engine coolant, or malfunctioning engine cooling systems can increase the engine's load, leading to poor heat dissipation. Engine overheating can cause poor lubrication, increased mechanical wear, reduced engine power, and result in weak acceleration.

[Thalia]

My Buick Verano also experienced sluggish throttle response before, where I could clearly feel the lack of power after pressing the accelerator and the RPM climbed very slowly. This is usually related to the engine's air intake and fuel delivery system. The most common issue is excessive carbon buildup in the throttle body, especially for vehicles frequently driven at low speeds in urban areas, as carbon deposits can obstruct normal air intake. Another possibility is a dirty or clogged air filter, preventing the engine from drawing sufficient air. A key factor is the condition of the fuel injectors—if they are clogged or spraying unevenly, the air-fuel mixture ratio will be incorrect. Worn-out spark plugs can also reduce ignition efficiency, leading to incomplete combustion. Additionally, insufficient fuel pump pressure or a clogged fuel filter may cause inadequate fuel supply. These issues require systematic troubleshooting. I recommend first using a diagnostic tool to read the data stream, focusing on air flow and fuel trim values.

[LeAugust]

Experiencing sluggish throttle response in the Verano can be quite frustrating, as if the engine is being held back by something. I've encountered a similar issue before and eventually discovered it was a problem with the exhaust system. A partially clogged catalytic converter can cause poor exhaust flow, just like trying to run while wearing a mask and struggling to breathe. There's also the possibility of clutch slippage, although it's relatively rare in automatic transmission vehicles. If you notice the engine revs increasing but the vehicle speed doesn't match, it's something to watch out for. Overfilled engine oil or prolonged intervals between oil changes can also increase operational resistance. If the fuel filter hasn't been replaced for too long and affects fuel pressure, you may experience sluggishness when accelerating hard as the fuel supply can't keep up. Remember, regular maintenance shouldn't just focus on oil changes - consumables like air filters and fuel filters should be replaced when due.

[OGabriella]

Regarding the issue of sluggish acceleration in the Buick Verano, I believe it can be analyzed from three aspects. In terms of hardware, first inspect easily overlooked components such as the air filter and throttle body. On the software side, data drift in the engine control unit or faulty oxygen sensors can interfere with the air-fuel ratio. Driving habits are also crucial – prolonged use of low-quality fuel tends to cause carbon deposits that clog fuel injectors. This is particularly noticeable in vehicles with expired spark plug life, as increased electrode gap leads to insufficient ignition energy for sudden acceleration demands. A malfunctioning fuel pump can result in uneven fuel delivery curves. It is recommended that owners regularly add certified fuel additives to clean the fuel system.