Weird Brake Problem, Vaccum problem, Pulling to 1 side..

[90TalonTsiPa]

I can pump my brakes up, it usually takes 10-11 times and then they work as normal *Until i let them go and hit the gas, then they go all the way back down again (almost to the floor). Almost seems like booster is not holding pressure or it's leaking air somewhere.
I can hear when i pump the brakes almost sounds like a bike Pump, like it's just pushing air.

With the Car OFF i can pump the brakes and they will get very stiff, as soon as i turn the car on they drop down and continue there until i pump them, about the 11th time they are full again. I have new Brake Pads and New Rotors on. 1 new caliper. - Yes i have bled the lines but seems like i'm still getting air after bleeding - they work -let car sit over night and they are back to where they were.

Also I noticed when the brakes aren't working properly *(they are almost to the floor)
the car is very hard to stop but the weird part is.. If i push in very hard
the Front Wheels WILL lock up, and pull to the pass side, the steering wheel even moves

List of things i plan on doing,
-replace both front calipers (may do big brake upgrade) since i got the small 90's -replacing full Brake lines Master Cyl. -Back (maybe seems like a hard job)
-replacing smaller Brake lines with Stainless (if $$$ lets me) and finally
-Bought new Brake Booster - not sure how hard this will be to install

ANy suggestions or help diagnosing before i spend more $$$

 

[90TalonTsiPa]

Took it to Pep Boys for their FREE brake check ,they said to try and get new calipers then they can tell me more...

$202.00 for them to do it.

 

[Closed Loop]

Are you losing brake fluid? This doesn't sound like a booster problem, if you had no brake boost, the brakes would feel the same car on and off. It sounds like air in the system to me, or master cylinder, or air in the master cylinder. Before you replace the calipers and booster, I would bleed the snot out of your system (start with the corner farthest away from the master cylinder). If you havn't replaced the brake fluid allready suck out the fluid in the resevoir and replace with clean and bleed at yoru corners until you get clean fluid. If that still doesn't work, do a master cylinder bleed. I've only ever done one on a bench, but I believe you can do one on a car. You will have to then repeat the corner bleed.

 

[90TalonTsiPa]

Not losing Brake Fluid, it seems everytime i bleed them brakes work fine for a while, then stop car, wait and their back to sponge everytime and bleed farthest away first, and theres air right away.

 

[1993eclipseGS]

did you ever fix the problem? when my car is turned on, I can pump the brakes and they stay pumped up for 1 second now. Before I stopped driving the car a week ago(Becuase of this problem) I went to stop and stepped on the brake pedal hard cause it wasent stopping, And the car went to one side, And the steering wheel went the other way. Any info you found out would be greatly appreciated.