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Clogged line Brake pedal hard

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When your brake pedal is hard, you may need to check your brake booster and the vacuum line to the brake booster if their is sanction, if their is sanction in vacuum pipe to the brake booster you need to have your brake booster replaced.
You also need to check your vacuum pump and the piping.

Posted on Oct 19, 2013

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Posted on Jan 02, 2017

gregs_rockin
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SOURCE: hard brake pedal on a 1998 toyota sienna

Problem with master cylinder will cause that sort of problem some times.

Posted on Oct 09, 2012

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Brake pedal is hard when vehicle is not running,but is soft when the 2005GMC Envoy is running.changed the brakes and rotors?


This sounds like a vacuum or hydrolic issue. If The pedal is spongy soft while its running it indicates air in the brake line, or faulty master cylinder, or faulty brake booster. A faulty master cylinder would get hard after a few pumps of the pedal. Since the pedal is hard when it is shut down, it makes me lean toward the brake booster.

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1 Answer

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3 Answers

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1 Answer

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1 Answer

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1 Answer

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