Brake peadal on floor

[powerstrokinturbo]

my brake pedal is on the floor but they do work. they were really spongy, then i blead them still spongy. then new master cylinder. now hard then spongy. Is this the brake booster? checked lines for leaks and checked my brakes they are all in good shape. dont have alot of money alreay spent what i had on what i thought it was, the master cylinder. Thanks.

[Backwoods]

Check the vacum lines. I had the same prob a while back. Replaced everting just to find I had a bad vacum pump. Unlike gassers, diesles have a vacum pump. I place a t on the vac lines and ran it to a vac gauge. I don't rember what it was pulling before and after the pump change, but is was significant. Maby the tecs can reply with the normal vacum pressure.

[ono_55]

Check your vacum pump you should have about 27lbs at idle.