ok i have a 97 f-150 and i have to press the break pedal half way down to engage the rear breaks and only the rear breaks i have a brand new master cylinder and all of my lines are bled properly and i have no line leaks what can it be?? can it be the abs modual that the front break lines go into???

 

To bleed the front lines you would have ample amounts of fluid coming out when pressing down the pedal. If you do, then you have front brakes unless the calipers are seized. Yes it could be other things. If you don't have ample fluid at the calipers, start cracking lines loose further up until you find sufficient fluid pressure. Easiest way I can say.

 

alright that seems like a good idea i have never thought of that thanks mann

 

Was this condition present before the master cylinder was changed? Did it get worse after the master cylinder change out?

 

it was like this before i changed the master cylinder and it continued after i changed it. i changed the master cylinder in the first place because i thought that was the reason for my brake problem