1997 f150

Here's what I've got:

New rotors
new pads in front & back
replaced barrels in rear
replaced both calipers

Problem:
Brakes go all the way to the floor

The lines have been bled and flushed. The pedal still goes to the floor.

What now? tia

 

master cylinder

 

Can you explain to me why its the master cylinder?

What about the brake booster?



Not trying to be an a**, I just don't really know what I'm dealing with.

 

if a booster goes bad you will have NO power assist...master cylinder you probably have a bad seal and it is allowing pressure to leak out the back side...if your brake booster is damp then its the master for sure...never a bad idea to replace the master when they get old and higher in mileage

 

Thank you for clarifying for me.

 

The brakes are a sealed hydralic system. If the master cylinder has an internal leak, the system is no longer sealed, letting the pedal go down. The purpose of the brake booster is to decrease the amount of force need to to apply the brakes. If it goes bad, the pedal is harder to push (like when the engine is off). but a bad brake booster won't let the pedal go to the floor.

 

I didn't mean to be repetitive, djfllmn posted while i was typing.