I've been putting up with a problem of low brake pedal for some time.The problem started out with the front brakes draging almost like power braking the car to spin the back tires.I switch out the front calibers,pads,and lines or hoses.The MC is new.I found that the pressure valves for the back wheels was causing the problem for the brake drag,the unit got switched.My brake failure block it's not leaking but I do get a brake failure light on once in a while.I believe that the problem is in the back system with air in there.I have used almost a gallon of fluid to bleed the brakes and I'm still at the same place low brakes.I'm almost ready to put the car on the lift and raise the back up as high and safe to see if the air can be pushed out that way on bleeding the brakes.I checked the search engine last nite and found that I'm not the only one that has had this problem.It's just that I haven't found the solution to fixing this.I've tryed to bleed the brakes everyway possible.I'm sure that one of you reading this has had this problem,but what did you do to fix it.The MC was bench bleed the brake booster is good fluid has always been in the MC so it's never been with out fluid.I had this problem at one time with the wife's 240 and it turned out to be air traped in the brake failure block all this has been checked on my car.
Thanks for any help.... Rodney