Brake pedal sinking...

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Aug 25, 2021 | 10:58 PM

dak911

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Three Wheelin'

Joined: Jul 2004

Posts: 1,461

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From: Ex NY, now Palm Beach

Brake pedal sinking...

I swear.if I hold the brake hard at a light rather than using the brake hold, I can feel the pedal sinking...Reservoir is full !!
Anyone else ??

Aug 26, 2021 | 08:35 AM

Petza914

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From: Clemson, SC

That's a Classic symptom of either a failing master cylinder or air in the lines.

Aug 26, 2021 | 10:25 AM

Terry Adams

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From: Eagle ID

Does the e brake apply itself at the same time you are pressing hard? This could be the "hold" feature.

Aug 26, 2021 | 10:51 AM

Petza914

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From: Clemson, SC

Quote:

Originally Posted by Terry Adams

Does the e brake apply itself at the same time you are pressing hard? This could be the "hold" feature.

I've been told the hold feature isn't actually done by the brakes, but is internal to the transmission, which is why it take some power to overcome the hold and you can feel it release.

Aug 26, 2021 | 06:34 PM

justabout

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Both of my 970 Panameras have done this from day 1. My guess is there is a pressure relief somewhere. You can press hard, sinks a bit then stops, then press hard again sinks again.

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