Brakes are acting very strange. For example, I had the car off and was able to press the brake pedal all the way to the floor with none of the normal effort required when the brake booster isn't active until about the 5th try, when it acted completely normal and became hard as a rock. I then started it, rolled forward and then applied the brakes as hard as possible, they didn't seem all that bad right then, so I did it a few more times and everything seemed ok. So by this time I had to get somewhere, so I hopped on the freeway and did some intermittent slowdowns and everything seemed perfectly normal. Then I come to the short SHORT freeway/median crossover/turnoff from 75 mph. Pedal IMMEDIATELY drops RIGHT to the floor and car slows like I'm only intending to slow down, running out of room fast, VERY fast, end up pumping the brakes about 3 times before anything really reacted. Then the rest of the braking and such was COMPLETELY normal.
I just don't get it. I visually inspected the lines and master cylinder. The MC reservoir is still as full as it was BEFORE this started happening. Not leaking a drop. Now my thinking would be that if it were something to do with the ABS, the car would TELL me something! Like an ABS light? No lights on. Visually, MC looks brand spanking new. I know the brake booster is ok, because I know what it would feel like otherwise. The ONLY things I can narrow it down to are a bad MC or something to do with the ABS system.
Kinda dangerous. Help. Thanks.