Brake fluid is hygroscopic, which means it absorbs water and therefore the two do "mix". Water in brake fluid can significantly reduce the boiling point of brake fluid. Alcohol? Brake fluid martini? If the original poster has a brake hanging up, causing heat and the brake fluid is contaminated, lowering the boiling point, the vaporized moisture in the lines could cause the pulsating he described.
Exactly what I was trying to say. Thumbs up on a high tech word.
hoepfuly he was able to fix the problem.
Brake fluid martini? You are the party animal but I kinda prefer a good coolant margaritta.
