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 · 07-26-2017, 07:56 PM

As I've thought about this more, I noticed a curious thing about the bleeding tonight. I got almost no air out of the system. I saw one or two tiny bubbles but nothing larger than a sand grain sized bubble. Since I did open the system up to replace the valve, I figured there'd be more air in the line. It makes me think that air is getting trapped in the ABS system and not bleeding out. I don't have a durametric to actuate it. In the past few weeks, I take the car for a hard drive and make sure the ABS kicks on. I've assumed that is enough to purge the ABS of air. But now I wonder if there isn't air still stuck in there....

07-26-2017, 07:56 PM	#28
Rotmilky Registered User Join Date: Feb 2017 Location: New Mexico Posts: 42	As I've thought about this more, I noticed a curious thing about the bleeding tonight. I got almost no air out of the system. I saw one or two tiny bubbles but nothing larger than a sand grain sized bubble. Since I did open the system up to replace the valve, I figured there'd be more air in the line. It makes me think that air is getting trapped in the ABS system and not bleeding out. I don't have a durametric to actuate it. In the past few weeks, I take the car for a hard drive and make sure the ABS kicks on. I've assumed that is enough to purge the ABS of air. But now I wonder if there isn't air still stuck in there.... __________________ 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.