Ford: 1982 Ford F150, mechanical knowledge, proper questions

Question
I recently had a braking problem where my brake pedal would slowly sink to the floor at a stop.  I changed my master cylinder and did a brake flush.  I have had to bleed my brakes twice since then, as my brake pedal disappears usually the day after bleeding.  What could be wrong? The truck has a 300ci engine with an automatic trans and only 56,000 original miles.

Answer
"Not everyone looking for answers has limited mechanical knowledge, and some of us can spell"


Then why are you on this site asking questions about a brake problem if you have so called "MECHANICAL KNOWLEDGE" I was simply trying to help you with the problem you were having on your truck not be CRITIQUED on my spelling and lack of mind reading skills to determine the proper questions to ask someone of your CALIBER in the automotive industry. I was simply trying to establish where you were at on your truck, and since I am at work answering questions to the best of my knowledge there is very little time to spell check. I apologize for any Inconvenience and wish you the best of luck finding an english major who has an automotive background and is willing to help you for free since we dont get paid to help people like YOU.