WHY DOES MY CAR REV WHEN BRAKING?

  • Tiny
  • emc2s
  • 2002 Hyundai Accent
  • 185,200 miles

Why does my car rev when braking?

Saturday, November 17th, 2012 AT 1:27 PM

3 Answers

  • Tiny
  • Wrenchtech
  • Expert
  • 19,541 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
  • Member

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
  • Expert
  • 19,541 posts

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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