have to pump breaks to stop!

[Jaswir]

i been having a soft break pedal... and i checked the fluid it was low (wasnt any in the resivor... put some in and i still have the same problem


ok...

when im driving i can put the brake pedal to the floor! and it barley slows me down then i pump it once or twice and i get my breaks back!

so i tried to bleed them real quick by my self and seemed a tiny bit better....


so u think i need to bleed them real good? or is my cailibers shot??

 

[86bluecobra]

OK you cannot properly bleed them with only 1 person. Bleed them again with someones help i'm sure this is your problem

 

[ronburgundy]

try a new master cylinder if you don't get air out.

 

[Brett88lx]

Check the vacuum hose coming from the upper intake.

 

[trbkrb]

If the MC was dry, you could have air in the MC itself and need to bench bleed it. Search on the topic to find info. But, you need to determine why the MC reservoir was dry. Unless the pads are almost gone and the reservoir had not been topped off in the past, it is unlikely that the reservoir would be empty unless there is a problem. Are any of the calipers or lines leaking? Is the MC leaking at the booster?

 

[Jaswir]

couldnt find no leaks.... in the past two years it has always been full... but i havent checked it in about 6 months... im gonna bleed them tomorrow with 2 people... i know i didnt do it right

i have no vacum leaks i could find...

 

[trbkrb]

OK, when you pump the brakes do you get a firm pedal? If so, does it slowly sink to the floor if you hold the pedal down for a while? If it does sink, then the MC probably has an internal seal leak and needs to be replaced. I've had that happen to a couple of mine over the years. Once it also leaked in the rear and actually leaked brake fluid into the booster, damaging the internals of it. When I pulled the old booster, it had a good amount of brake fluid sloshing around inside it.

 

[Roland69]

Check for Brake Fade and if there is you have a blown line or your master is done.....if there is no fade try doing a good bleed with 2 people and start at the RR than LR than RF than LF...start farthest from MC and work your wat towards it.

 

[bill302]

When a brake master cylinder begins to go bad or fails, you will notice a soft or squishy feeling when you press down on the brake pedal. When constant pressure is maintained on the brake pedal (like when you keep your foot on it at a stop light), the brake pedal will begin to sink to the floor as the brake fluid leaks internally in the master cylinder. This is called "extended travel" when the brake pedal goes farther down than normal or than it was intended to. When this occurs you will have to "pump" the brake pedal to regain normal pressure and to keep the car from moving forward because the brakes are slowly releasing.You will not normally see the brake fluid leaking out externally of the brake master cylinder or from the wheel areas when this pedal softness occurs, so fluid level alone isn't an indication of a good or bad brake master cylinder. The fluid will usually not be low or in need of topping off…remember the leak is internal and the brake fluid is leaking past internal O-rings, so an obvious external sign that the master cylinder is "bad" is usually not existent. check for these signs and repost...

 

[Jaswir]

no the pedal does not sink to the floor... it only goes to floor when i first try to stop... then i pump once or twice then i get my brakes back... then when i drive again for a lil bit i then again have to pump it.... but im going to try bleeding them real good first and see if that does it....

 

[surrett]

right the opposite of this problem..

im having something similar too what you are having....

when im driving and i go to stop. the brakes are perfectly fine..the first push,...but if i let off the braks then.. push again the peddle Gets real Stiff..but i still have breaks but real hard to push....i allmost hit a parked diesle in the rear.. cause the brakes were too hard to push..i am allmost positive its the master cylinder..but i could be wrong in my case...hate to steal the topic just thought mabye i could jump in and get an answer too thank you Stangnet members.

 

[Roland69]

also check your rear brake cylinders