ghetdjc320 Posted July 29, 2020 Share Posted July 29, 2020 Have an odd little vacuum sound. I run a dual diaphragm 8” booster and an electric vacuum pump that runs fairly high vacuum (24in). Recently, when I let off the brake pedal their is a vacuum suction sound that lasts for just a second then sounds like a valve closes shut. Almost sounds like something is a bit sticky in the booster and needs some oil. The booster isn’t leaking at all while breaking and works fine otherwise. Any ideas what it could be? Link to comment Share on other sites More sharing options...
Pete M Posted July 30, 2020 Share Posted July 30, 2020 vacuum escaping past a seal? I've never dealt with a system that runs that high. Link to comment Share on other sites More sharing options...
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