What Causes Severe Vibration During Car Acceleration?

[Nancy]

Possible causes include a dirty throttle body or excessive carbon buildup in the fuel injectors and intake passages. Below are the reasons and solutions for vehicle vibration: 1. Causes of vehicle vibration: When the car engine vibrates abnormally during driving, sometimes accompanied by failure to start, it may be due to a dirty throttle body or excessive carbon deposits in the fuel injectors and intake passages. In cold conditions, carbon deposits can absorb some fuel, and if the fuel doesn't completely enter the cylinder for combustion, it can cause unstable idling and difficulty starting. 2. Solutions: First, visually inspect whether the balancing weights on the wheel rims are missing or if there's any obvious deformation of the wheel hub. If no issues are found, professional testing equipment is needed, as subtle deformations in the tie rods, suspension, or wheel hubs are hard to detect with the naked eye. First, check if the left and right half-shafts are bent. Then, disassemble and inspect the inner walls of the left and right inner CV joints for wear and pitting. In most cases, the problem is caused by damage to the inner CV joint.

[JaylaRose]

I've been driving for over a decade and have experienced acceleration shudder issues before. It feels like the car is disco dancing, which is truly uncomfortable. The main cause could be problems with the ignition system, such as worn-out spark plugs or failing ignition coils, leading to uneven engine combustion and severe shaking during acceleration. Another possibility is fuel system issues, like clogged fuel injectors or an underperforming fuel pump. When the engine doesn't get enough fuel, it's like starving, naturally causing violent shaking. Additionally, worn engine mounts that can't absorb vibrations will make the engine wobble, transferring the motion to the entire vehicle. Imbalanced tires or worn wheel bearings might also transmit vibrations to the car body, especially noticeable at high speeds. I recommend paying attention to regular maintenance, such as checking spark plugs every 20,000 kilometers. Don't wait until problems escalate before fixing them, as it compromises driving safety. Safety always comes first.

[Stephen]

As someone who frequently repairs cars, I've encountered quite a few cases of acceleration shuddering, with the core issues being uneven ignition or unstable fuel supply. During inspections, first use a multimeter to test the spark plugs and coils—replace them if the resistance values are abnormal. For fuel-related aspects, check the injector spray volume and pressure; clean or replace them if clogged. Worn engine mounts can also transmit engine vibrations to the body—you can judge by removing the hood and feeling them. Issues in the air system, such as a dirty throttle body or air leaks, can affect the air-fuel mixture ratio and cause shuddering. Additionally, damaged drive shafts can worsen shuddering during turns. For self-inspection, start with simple steps like replacing a spark plug. If that doesn’t work, take it to a professional shop to read the fault codes with a diagnostic tool—don’t delay and risk damaging more components.

[DiRose]

As a car enthusiast, acceleration shudder makes me feel like the car is struggling! Possible causes include spark plugs failing to ignite, leading to cylinder misfires, or uneven fuel injection from the injectors causing the engine to starve and shudder. The most common issue is damaged engine mounts, which lose their damping effect when aged, causing the body to wobble. Modified cars may also experience shudder due to improper ECU tuning, affecting performance. Unbalanced tires transmit vibrations to the steering wheel, while damaged drive shafts are more noticeable at high speeds. Solutions include DIY upgrades like replacing spark plugs or cleaning the throttle body, or visiting a tuning shop for ECU optimization. Paying attention to these details can enhance driving pleasure and ensure smooth, effortless acceleration.