My brake petal is low

[Sneakerhead28]

This past week i was drivin around and i noticed that everytime i brake the pedal keeps going down til it basically reaches the floor now i spoke to my friend about it and he told me it looks like its a problem with the master cylinder. could it be??

If it is then what i plan to do is buy the master cylinder and jus change it myself because they are charging me 150 for the labor but first i would need help from fellow cb7tuner members out there. If you have changed a mastercylinder care to help out and share some info

[GearBangnAccord]

http://www.autozone.com/shopping/rep...00c1528005fc68
Be sure to bench bleed prior to installation

[Sneakerhead28]

alright thanks for the info man , so u agree that the problem sounds like its definitaly the master cylinder

[AbsurdNY]

Did you ever let the brake fluid drop low where it could have got air in the system? You might not need a master cylinder. I would make sure the fluid level is full and bleed the brakes first . If your fluid was low to begin with and your brakes pads wear down, the piston can come out more then normal and cause the fluid level to go down. This can happen when someone changes the brake pads and compresses the piston causing the fluid to over flow. When those pads wear down, the fluid drops very low because it has lost fluid from overflowing on the last pad job.

[Sneakerhead28]

u kno wat u could b right too cause i just changed my rotors and pads not to long ago and after i got the job done thats when the problem 1st started

[AbsurdNY]

u kno wat u could b right too cause i just changed my rotors and pads not to long ago and after i got the job done thats when the problem 1st started

Did you do the pads yourself? How long ago did you change the pads? Open the fluid cap and take a look in there.

[Sneakerhead28]

no i got em done with a mechanic and it was dont about 2 months ago and when i check the fluid its full

[AbsurdNY]

no i got em done with a mechanic and it was dont about 2 months ago and when i check the fluid its full

If the fluid is full, I would try to bleed it and see if that works. If not it's probably your M.C.

[Sneakerhead28]

Alright man thanks for ur help ima try it out dis weekend at my job see how everything works out ill be back with results

[AbsurdNY]

Alright man thanks for ur help ima try it out dis weekend at my job see how everything works out ill be back with results

No problem man.

[Crankshaft]

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just make sure if you bleed you do it right, i've found out a lot of people leave the purge valve open too long alowing for the piston to relax and pull air back in the lines.

[Crankshaft]

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when you purge have someone pump the pedal about five times and hold it down, open the purge valve for about one second and a half and repeat, also make sure you have no small leaks in the system even those cause that

[Crankshaft]

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the second way to do it is to get a hold of a coke bottle and fill it up about 3/4 with brake fluid, get a small hose that fits tight on the purge valve and submerge the other end inside the bottle with the fluid. make sure it is deep to where it will not suck air, open the valve and climb inside and pump slowly about 15 times then just do the same on the rest

[tear2wo]

Ok I learned about an easy way 2 bench bleed the mc. Once you have the new one in , connect all the lines. Get some1 to help you and push the brake pedal SLOWLY. When they do that release 1 of the brake lines on the mc till you see a solid stream come out and repeat on the other line.

Now once your done with that its time 2 bleed the brakes. You have to do it in ordre of furthest from the wheel. So you start with the rear passenger, then driver rear, then passenger, and then driver.

Hope this helps. Good luck

[ninjaranger84]

So Basically wat everyone is sayin is that the problem is a new master cylinder? Ok im gna do this soon cuz i had the same problem with my truck last year and it scared the shit out of me wen i went to hit the brakes. A 385 Horsepower ranger Is fun but wen ur truck cant stop it turns to hell.