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What Causes Hard and Ineffective Braking in Cadillac?

2 Answers

LuciaDella

07/24/25 3:49am

Here are the reasons for hard and ineffective braking in Cadillac: Vacuum-related reasons: Factors affecting vacuum include: cracks in the atmospheric valve seat, fatigue damage to the diaphragm, cracks or failure in the vacuum valve seat, and failure of the one-way valve in the vacuum hose. Free travel-related reasons: No free travel or insufficient free travel in the brake pedal may lead to hard braking or excessive pedal force. Jump value and jump point-related reasons: The jump value is not only the main cause of hard braking but also a quantitative indicator of it. A high jump value is determined by the height of the jump point, and the initial feel of pedal force is also influenced by the jump point's height.

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VanAlessandra

08/10/25 11:25pm

I've encountered quite a few cases where Cadillac brakes feel hard and fail to stop properly. From experience, this is usually linked to brake booster issues. The braking system relies on vacuum boosters to assist in reducing pedal force. If it fails or there's a vacuum pump leak or vacuum hose rupture, the pedal becomes rock-hard, and even stomping on it won't stop the car effectively. Common causes include aging or damaged diaphragms inside the booster, or loose/leaking vacuum lines, often due to vehicle age or frequent braking causing component wear. If this happens, immediately slow down and pull over to a safe spot—never risk driving further. Popping the hood to listen for hissing air leaks is a temporary diagnostic method; if the brakes remain hard after starting the engine, it likely confirms a vacuum system failure. Long-term, inspecting the booster and vacuum components every 100,000 km helps prevent this. Safety first—don't delay, get it fixed promptly at a reputable auto shop.

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