# Nov12 show- sinking pedal, trumpeting sound

**URL:** <https://community.cartalk.com/t/nov12-show-sinking-pedal-trumpeting-sound/69589>\
**Category:** The Show\
**Created:** [November 19, 2011, 6:54am UTC](https://community.cartalk.com/t/nov12-show-sinking-pedal-trumpeting-sound/69589 "2011-11-19T06:54:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\
**Post date:** [November 19, 2011, 6:54am UTC](https://community.cartalk.com/t/nov12-show-sinking-pedal-trumpeting-sound/69589/1 "2011-11-19T06:54:19Z")

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The brothers said it was a bad master cylinder, it sounds more like a brake booster with a hole in the diaphram. They frequently make a whooping or trumpeting sound and the missing brake fluid would be going down the vacuum hose and burning in the engine.