What Causes Car Vibration During Low-Speed Braking?
2 Answers
The reasons for car vibration during low-speed braking are: 1. Throttle blockage, carbon buildup, or abnormal opening; 2. Carbon buildup or blockage in the fuel injectors; 3. Spark plug burning or damage; 4. Use of low-quality gasoline leading to fuel pump blockage; 5. Incomplete combustion of the air-fuel mixture in the cylinders. The methods to address car vibration during low-speed braking are: 1. Read fault codes or data streams to eliminate sensor faults; 2. Check if the exhaust gas recirculation valve has any issues; 3. Inspect spark plugs, high-voltage lines, ignition coils, fuel injectors, timing marks, fuel pump pressure, and cylinder pressure; 4. Check if the idle speed motor has any problems, and clean the throttle and idle speed motor.
I recently experienced severe shaking when braking at low speeds and initially thought it was due to uneven road surfaces. After consulting a friend, I learned that the brake discs had become uneven, likely caused by frequent hard braking during daily driving, leading to uneven heat distribution and deformation. The imbalance in friction during low-speed braking caused the shaking. I also heard that excessive wear or material issues with the brake pads could be the culprit, and replacing them might solve the problem. Additionally, problems with the suspension system, such as aging shock absorbers, could cause similar vibrations. Now, during regular maintenance, I always ask the mechanic to inspect the braking system. After replacing the discs, the issue disappeared. Brakes are critical for safety, so it's not worth skimping on minor expenses, especially in urban driving with frequent stops, where problems are more likely to arise. Prevention is always better than repairs after the fact—spending a little extra time on attention can save a lot of trouble.
