Dareyn Dudley

So i just bought a honda. 97 accord ex-r canada car i suppose. 4 cylinder vtec auto. I press the brakes it goes to the floor. No leaks under.. Could it be my master cylinder is out? Thanks in advance

Justin02Accord

It could, but also might just have air in the system and needs to be bled. I'd check that & fluid level first.

MAD_MIKE

Easy check.
With the engine off pump the brakes til the assist is gone and the pedal firms up, keep normal pressure on the pedal. Turn the engine on, if the pedal drops to the floor with the engine on then the BMC internal seals are leaking.
If the pedal doesn't change at al, verify there is fluid in the BMC if there is and the BMC is older it is most likely blown as well.
Unless the BMC is new or appears new, over-stroking the BMC usually damages the seals and will need to be replaced.

Dareyn Dudley2

Hey there guys its the same guy had to remake another account.. So i guess the guy i got it from said his son had to panic break and i guess ever since then its been to the floor. I took the master cylinder off pushed the piston and it shoots out fluid. I popped the vaccum off the booster and it popped off so im assuming good vacuum.. Idk what it is.. Has 4 wheel discs

MAD_MIKE

Blown BMC, just get a new one, rebleed and be done with it.
A new one from Rockauto is ~$50.

The BMC will shoot out brake fluid with no resistance, it's the resistance that will cause the seal to fail.

Dareyn Dudley2

Will a master cylinder from a 98 accord v6 replace mine would be easier then spending money lol. Idc at this point bought car for 150$

MAD_MIKE

Nope. 98-02 are just different enough.