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Old 09-06-2018, 07:15 AM
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Join Date: May 2017
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Default Brake Pedal sticking

Hi from Germany! My Riviera has this problem: Sometimes (engine on) the brake pedal sticks after hard braking and comes loose again after a few meters of driving. Brake booster and master brake cylinder are new. I did the brake booster test (engine off, some steps on pedal until hard, engine on, pedal goes down a few inches) and this was ok. When the pedal is stuck (at idle) and when I remove the valve from the brake booster the pedal comes up! There is a lot of vacuum on the hose and the valve is ok. I exclude problems with calipers, brake hoses, because when I use the brake with the brake booster valve disengaged everything is ok (with the exception of course that I need much force to brake). I would very much appreciate every hint what I can do next and how to solve the problem.

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Old 09-06-2018, 11:10 AM
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Join Date: Sep 2010
Posts: 741

You know this question was coming, did you have the problem before replacing the master and booster?

There should be a vent to allow air into the booster when vacuum is applied to the other side of the diaphram. Check to make sure that vent is not blocked.

Last edited by hanky; 09-06-2018 at 11:13 AM.
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