toyota pickup, brake ?

[dabaer]

Ive got a 94 toyota pickup and i cant get the brake pedal to firm up. when truck is running and i try to stop the pedal goes right to the floor and barely gets me stopped. i checked all lines for breaks, found nothing leaking anywhere, tried bleeding the lines, that didnt help. when i pump the brake while truck is shut off, pedal will firm up. i come down to thinkin it could be the master cylinder there, but i dont know. any help would be much appreciated thanks.

[Big Buck Buster]

Sounds like the master cylinder to me.

[Jeremy airjer W]

Or the rears are that far out of adjustment?

[Macgyver55]

Is this something that came on slowly over time, or did the pedal get mushy all of the sudden?

[dabaer]

macgyver, yea the pedal got real soft all at once a while ago...i havent been drivin it around lately (been too busy with school but i got spring break comin so i figured i could try and get er goin again).

[Jeremy airjer W]

You checked the rear brakes and wheel cylinders for leaks?

[Macgyver55]

My first thought would be to pull all 4 wheels and check pads/shoes, you may have had one separate. If all of those look ok, I'd go back to the master cylinder.

[dabaer]

ha i never did pull the drums off the rear, so once i get to lookin at er ill check them first but i think they should be fine, and i did check front wheels those were fine. hey thanks for the info guys!