Some one Help PLEASE ! My Truck is a 1995 F250 5.0 the brake pedal is great Engine off, The brakes work but the pedal fades to the floor Engine running, This problem started after I let a local shop replace the front brake pads, All brake componets have been replaced multible times 4 boosters 3 master cyl, hoses calipers, wheel cyl's, Gallons of break fluid Bleeding the system mulitble ways and so on, The shop only charged me for the Pads and have tried to fix the problem including by Passing the RABS, and there is no excessive clearence between the Booster and the Master cyl,
Now I'm stuck with fixing it myself,The master cyl is a 1 1/8 bore, I have not tried changing the Booster with the zero leak booster, Has anyone run into this problem? And do you think this Zero leak Booster will fix my problem ? Have never had so much trouble with brakes, Ever !

 

Problem Corrected ! 100%

 

After replacing Cheep Rusted junk parts that the local repair shop installed, by passing the RABS module,Installing the ZERO leak brake booster,Pressure Bleeding the system and NOT FIXING THE PROBLEM ! HERE IS THE CORRECT FIX! I installed a 1-3/16 F450 master cylinder and the problem Is 100% Fixed---- Just a thought, What probably happened when the local shop ruptured the RABS module forcing fliud back threw it and causing the brake pedal fade problem they changed out the master cylinder with out measuring the piston bore size(or looking at the size cast on the side of the original master cylinder) the master cylinder that the local shop installed was 1-1/16 ! Thus creating the brake job from Hell. Note always go up in master cylinder size not smaller.Also the Parts Houses only listed the 1-1/16 or 1-1/8 master cylinder for my Truck, The booster was strong enough to push the master cylinder piston passed the fluid, AKA Fluid By Passing !! Hey Guy's and Gal's I took the time to post this Confirmed Repair Why Wont You ?