1997 4runner 3.6 v6 auto 4wd stock rims and tires with abs. I have replaced the rotors with oem and added a set of duralast creamic based pads with new shoes and drums on the rear. Master cylinder and reservoir are new also. I have visually inspected all the hard lines and checked each wheel for leaks and the level in the reservoir hasnt dropped.
The entire system has been bled completely a couple of times using new fliud and no air bubbles remain at the wheels. When the engine is off you can pump the pedal 3 times and stand on it and it does not move. With the engine running if you let it sit for a short time and go for the pedal it drops almost to the floor (within an inch or so) then if you push it again it firms up but then slowly drops to toward the floor under pressure. The truck stops very well when you have a chance to pump the brakes first but that first push it feels like theres nothing there. This is my wifes daily driver and I have the same setup on my taco with no issues only diffrence is I have no abs. Please if you have any suggestions let me know!!!!! Im not sure what to do next.