986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Brake pedal stops normally then slowly fades to floor. Master cylinder? Booster?

Rotmilky · 07-03-2017, 04:28 PM

Installed new Master cylinder. Bled the brakes with a power bleeder (I got one a few years back). Bled the clutch. Still doing the same thing. Normal brake feel with full ABS kicking on when I stomp hard. Plenty of room between lockup and floor. Then slowly the brake pedal lowers to the floor. Checked all the connection points and cannot find a leak. Fluid level in the reservoir isn't changing. Guess I'll put on a new brake booster since I can't think of anything else.

If someone has another suggestion, let me know...

07-03-2017, 04:28 PM	#11
Rotmilky Registered User Join Date: Feb 2017 Location: New Mexico Posts: 42	Installed new Master cylinder. Bled the brakes with a power bleeder (I got one a few years back). Bled the clutch. Still doing the same thing. Normal brake feel with full ABS kicking on when I stomp hard. Plenty of room between lockup and floor. Then slowly the brake pedal lowers to the floor. Checked all the connection points and cannot find a leak. Fluid level in the reservoir isn't changing. Guess I'll put on a new brake booster since I can't think of anything else. If someone has another suggestion, let me know... __________________ V.H. Whitley Owner of Waaay too many vehicles Non Porsche :1959 International B120, 1960 International B120, 2015 BMW M3 Porsche: 1997 986, 2001 986S, 1968 911L, 1968 911S, 2005 911, 1984 928, 2008 Cayenne S.