Brakes
 

At first I had no brakes in my 93 f250... I litterly had to lift my but out of the seat and put all my wait on the pedal to stop... I changed the booster. Got a little better. Changed the master cylinder.. Still hard to stop. I don't know what the deal is

Pull the hose out of the booster and check the vacuum on it while the engine is running. I can't remember what our trucks pull stock but it's around 20-21in, I believe.

Based on what you described, the pedal isn't bottoming-out, its just really hard to press, right?
That's the only things I know of that cause a hard pedal, is bad booster or no vacuum.

-Joshua

Sounds like you're dealing with a hard pedal right? You covered the booster, vacuum pump is next, but check the hoses first.

Joshua beat me to it. :-X22

you need minimum of 17 inches vacuum for the brakes to work.
otherwise you get the hard pedal.
sounds like your vacuum pump is shot.

Thanks guys, is the a way to check my vacuum, I believe I remember it having a vacuum but don't know how much

if your climate control works and your tranny shifts, then you probably have a vacuum hose problem isolated to the lines for the brakes assist. If your brakes, climate control, and tranny shifting all don't work, then your vac pump is probably shot.

Put a vacuum gauge in the system and see what you get.
I think you'd want it near the booster, and monitor what happens not just at idle, but when you hit the pedal what happens, and how fast to recover.

Also check the vacuum reservoir. Its the thing that looks like a coffee can mounted on the drivers side fender

Don't think I've seen a vacuum reservoir. Been under my hood quite a bit and even had the whole fender well out. And my truck is manual. Can autozone test my pump?

I imagine your booster looks like mine. The vacuum line that attaches to the booster is where you can test from. Trace it to see where it goes, in case you're missing the reservoir (again, coffee can-looking thing, on the left fender in my truck).

I bought a vacuum gauge from Advance for like $25 the other day for some transmission stuff. You might need an adapter of some sort, but it should be pretty straight forward to test it on your own.
http://wecphoto.smugmug.com/photos/i...-ssXdPdX-L.jpg