Changed out brake master cylinder due to fading brake pedal and no visible leaks. Ended up changing right front brake caliper due to broken bleeder valve. Bled entire system. Have good brake pedal without engine running very little movement. With engine running, brake pedal goes to floor. Can hear no vacuum leaks or engine changes. Removed master cylinder to check o-ring at master cylinder/vacuum chamber connection. Found o-ring rolled and corrected. Bled entire system again. Still have problem. There are two ports on the reservoir, one at the lower rear which goes to the vacuum chamber and one on top ( just behind filler cap) which is open. I do not remember removing anything from the one on top ( and I did not take picture), is there supposed to be a hose connection here? Most on line help deals with hard pedal with engine running vacuum problem. 118000 miles not 11800.
Thanks for listening.
have the same problem?
Sunday, May 14th, 2017 AT 5:05 PM