Brake fluid flush, now soft pedal?

[ChrisZang]

Ok, next guess would be a leak at the master cylinder?

[Timco]

Originally Posted by ChrisZang

Ok, next guess would be a leak at the master cylinder?

No fluid level loss. No drips. Pedal is rock hard with car off on second pump. Does not lose pressure. Turn car on, drops 2/3 way down. Second pump it's reasonable. Third pump tight and stays tight. Let off for a second, drops next push.

[ATX_Boxster]

For me... And FWIW - I'm new to flushing my brakes with a Motive power bleeder.

My first time (:troll I learned a lot. Especially ways in which air can get trapped into the brake system.

I now use the Motive to pressurize the system by itself without filling it with fluid, and then I'm very careful not to let the reservoir get too low. It seems that it can happen quickly.

Sounds like an sir bubble could be causing the foot pedal feedback?

[Timco]

Originally Posted by ATX_Boxster

For me... And FWIW - I'm new to flushing my brakes with a Motive power bleeder.

My first time (:troll I learned a lot. Especially ways in which air can get trapped into the brake system.

I now use the Motive to pressurize the system by itself without filling it with fluid, and then I'm very careful not to let the reservoir get too low. It seems that it can happen quickly.

Sounds like an sir bubble could be causing the foot pedal feedback?

If so it's stuck. I've now got a full bottle of brake fluid through the system, a tall bottle. Excellent pressure when we do the pump & crack bleeder method. Then it drops when the car is started.