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Why breaks fails to oprate when engine stopped

Tiny
VIPINCHITTODA
  • MEMBER
  • 2010 TOYOTA COROLLA
  • 13,000 MILES
Why breaks fails in car once the engine stopped
Monday, August 27th, 2012 AT 1:27 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
When the engin e is running you have vacuum or someother power supply to give power to power brakes. Whe it is off there is only enough power left to give one, maybe two hits of the brake pedal. They will still work only will be hard to push down. If they are broke when engine is off then they will be with engine running as well.
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Monday, August 27th, 2012 AT 1:56 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
After engine is stopped, the first two strokes of the pedal should be soft with assist but if it is hard immediately, you have a vacum leak with the booster.
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Monday, August 27th, 2012 AT 5:41 PM

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