My rear ABS activated this morning and now my pedal is all spongy with lots of travel. Brakes still have OK stopping power though? I bled the whole system and nothing changed. Any ideas?

 

was it ever bled dry? there is an abs valve that if it goes dry will flip and personally i would take it to a qualified mechanic to have them fix that if that is the problem. i dont mind working on brakes but abs is a differant ball game. have you have your brakes replaced or anything recently? #1 cause of sponginess is air in the lines. or maybe even your brake booster vac hose is cracked or not on all the way. after driving for a few min stop the truck and hold the brake down if it starts out at one level and starts going down father and farther you more then likely have a leak at the booster. could be hose or the booster itself.

 

Never been dry. No new parts. Never any problems.

 

is your fluid black and dirty? after a while of heating and cooling the fluid will aquire moisture.

 

Nope, Fluid is fresh. The truck has been maintained very well and has 85K on it. I have read some other posts about this and it seems that maybe now my brakes are "normal" for a F-150?

 

compared to gm's and dodges brakes fords brakes are mushy. if you want to search there are a few posts on how to clean your slides and things on your brakes. fords are also know to get these parts dirty creating terrible feel. sorry i couldnt be more help for you. if it still seems its going farther then it should it might be time to visit the stealership