I have a problem with my brake system I need help.

When I'm driving like 40 mph and more and press the brake pedal it goes down all the way to the floor. I have to pump it a few time just to get a full stop. But wen I'm driving under 30 mph it stops fine. I bleed the system by the brakes and still does the same thing. I took the old fluid out and put some new one in. And still does the same. I checked the rotors, pads, and rear shoes and they are good.

I need help or advice on this cuz I'm clueless.

 

Have you ever replaced your Master Cylinder/Brake Booster?

 

As said above sounds like your Master cylinder or brake booster.Hows your brake fluid level?

 

Nah I didn't replace none. Could it be the calipers?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tazz29 &raquo;</TD></TR><TR><TD CLASS="quote">Nah I didn't replace none. Could it be the calipers?</TD></TR></TABLE>

Why would it be the calipers? Are they somehow both leaking brake fluid?

 

Nah they are not leakin.

 

why not have a buddy pump the brakes and take an LED flashlight and find out where its pissing fluid? And if you're losing absolutely no fluid, its 95% likely to be your booster.

To check the vacuum booster, pump the brake pedal until it is extremely stiff / high / hard, then start the car. You should feel the pedal depress slightly as engine vacuum gets to the booster to move the diaphragm. If theres no change, check the hose. If okay, the problem is in the booster and the booster needs to be replaced.






Modified by ComeOnKip at 2:08 PM 7/9/2008

 

Iight thanks a lot for the advice guys.