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Why does my car rev when braking?

Tiny
EMC2S
  • MEMBER
  • 2002 HYUNDAI ACCENT
  • 185,200 MILES
Why does my car rev when braking?
Saturday, November 17th, 2012 AT 1:27 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Do you mean that if you are sitting still, idling in park and step on the brake, the RPM goes up?
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Saturday, November 17th, 2012 AT 1:43 PM
Tiny
EMC2S
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It happens when I press the brake for a full stop. It happens intermittently though but more and more lately
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Saturday, November 17th, 2012 AT 2:13 PM
Tiny
WRENCHTECH
  • MECHANIC
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That could be a leak in the Vacuum booster. Have someone else hold the brake while you pinch off the vacuum hose to the booster and see if it idles back down.
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Saturday, November 17th, 2012 AT 2:38 PM

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