What Causes Intermittent Hard and Soft Braking in Cars?
2 Answers
Intermittent hard and soft braking in cars is caused by a damaged return spring, which can be resolved by replacing the return spring. Below is relevant information about automotive brake fluid: 1. Function: Brake fluid transmits hydraulic pressure when the brake pedal is pressed. The master cylinder increases the fluid pressure, causing the pistons in the wheel cylinders to extend through the action of sealed cups. This utilizes lever principles to apply force on the brake discs and pads, achieving braking. 2. Replacement Interval: Depending on the climate and humidity of the vehicle's location, replacement intervals vary. In tropical regions, replace annually or every 20,000 km; in cold regions, every two years or 40,000 km; in temperate regions, every three years or 60,000 km.
When my car experiences inconsistent brake pedal feel—sometimes soft, sometimes hard—I usually suspect air bubbles in the brake system first. After all, if brake fluid is leaking or wasn't properly bled of air bubbles, the pedal will feel unstable, alternating between light and heavy. This is likely due to aging pipes leaking fluid or improper maintenance procedures. Another common culprit is a faulty master cylinder, where worn seals can cause uneven internal and external pressure, leading to inconsistent brake feedback. Booster issues might also be involved; for example, a broken vacuum booster component can make the pedal feel unpredictable. I've also noticed that if the car has ABS, sensor problems or module malfunctions can disrupt pressure control. These issues are quite dangerous, potentially increasing stopping distances or even causing accidents, so I recommend getting a professional inspection immediately—don't delay. Regular maintenance, like periodic brake fluid changes and pipe inspections, can help prevent these problems.
