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Revs up while braking

Tiny
RCCARPET
  • MEMBER
  • 1976 BMW 2002
  • 2.0L
  • 4 CYL
  • 2WD
  • MANUAL
  • 159,000 MILES
Revs up at stop while brake is engaged.
Friday, November 3rd, 2017 AT 8:57 AM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
This is a likely vacuum leakage problem.
Check for vacuum leakage at the brake booster and its hoses.
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Friday, November 3rd, 2017 AT 10:25 PM
Tiny
RCCARPET
  • MEMBER
  • 2 POSTS
Thanks.
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Saturday, November 4th, 2017 AT 7:16 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
Here is a test from a guide on the site that can help you see whats going on:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/engine-idles-too-high

Please let us know what happens.

Cheers, Ken
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Sunday, November 5th, 2017 AT 6:21 PM

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