Answer
Apr 09, 2025 - 06:05 AM
To check for a brake vacuum leak, start by listening for a hissing sound near the brake booster, which can indicate escaping air. You can also use a vacuum gauge connected to the vacuum line going to the brake booster; a reading significantly lower than the expected vacuum level (typically 15-20 inches of mercury) suggests a leak. Additionally, spraying a soapy water solution around the vacuum hoses and connections while the engine is running can help identify leaks by revealing bubbles where air is escaping.
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