Let say I'm at a light waiting w/ my foot on the brake pedal.
The Pedal just sinks all the way down and I start to roll So I let go and the brakes are hard again next 5 seconds later it starts sinking again and i start to roll again what could be the problem????

 

master cylinder is going bad

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrettyLude &raquo;</TD></TR><TR><TD CLASS="quote">master cylinder is going bad</TD></TR></TABLE>

I had the same problem, I changed my brake fluid like twice until coming to that conclusion

 

also check the booster, if the fluid leaks back into it, it will eat the rubber diafram

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chandler &raquo;</TD></TR><TR><TD CLASS="quote">also check the booster, if the fluid leaks back into it, it will eat the rubber diafram</TD></TR></TABLE>

the chances of those going out are slim and none, your master cylinder will fail way before you booster will fail

 

Bleed your brakes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrettyLude &raquo;</TD></TR><TR><TD CLASS="quote">master cylinder is going bad</TD></TR></TABLE>

He's right

 

if ur losing fluid, then there's a leak in the lines, else ur master cylnder is leaking internally..

had this problem on my teg last week.. turned out my hard lines going to the rear brakes rusted through and need to be replaced.. i ended up redoing the lines from the firewall back to the rear brakes..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrettyLude &raquo;</TD></TR><TR><TD CLASS="quote">master cylinder is going bad</TD></TR></TABLE>

By experience

 

Okay. I changed the master cylinder, took it from my old integra which was working well no problems.
The pedal doesn't sink in anymore, but NOW the pedal is only hard when it is an inch from the floor.

 

Now this time you either left some air bubbles in (bleed it some more), or your MC is the wrong size.

 

Bleed the breaks for sure

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by solk1dd &raquo;</TD></TR><TR><TD CLASS="quote">Okay. I changed the master cylinder, took it from my old integra which was working well no problems.
The pedal doesn't sink in anymore, but NOW the pedal is only hard when it is an inch from the floor.
</TD></TR></TABLE>

Just had the same thing happen to me.

Not all Mater Cylinders are the same. Take a measurement of the hole in the center of the master cylinder, for depth. There was a 1/2 inch difference between the two I had. From the outside they looked exactly the same. Either adjust your pedal down under the dash where the clip mounts the brakes to the pedal or make a shim to go down in the hole to take up the space.