1997 civic brake problem

[HMGDRFTER]

okay i just changed the brakes on my 1997 honda civic dx coupe, the brakes are really hard like it's supposed to be when the car is turned off, but as soon as you turn the car on the brake pedal goes all the way to the floor when you step on it, it's really soft.. i've bled the WHOLE system already, theres no air but i don't know why the pedal is sinking to the floor when i start the car... any ideas?

[jdmdb8itr]

is there a leak anywhere,check the mc, and check fluid.

[Barefoot]

bad master cylinder

[HMGDRFTER]

bad master cylinder

thats what im thinking too, but the wierd part is the brakes were just fine before i installed the new brakes.

[CaTcH22]

Compressing the calipers could have hurt the mc.

[Barefoot]

Compressing the calipers could have hurt the mc.
correct the rush of fluid back into a weak seal mc will completely fuck it up.

[hmong_Spec]

same thing happened to david's GSR. its the brake master cylinder, no doubt. unless you got a leak in one of ur line.

[CeOTiO8]

bad master cylinder
X2

same thing happened to david's GSR. its the brake master cylinder, no doubt. unless you got a leak in one of ur line.

Yea same thing happened to me... Next time I will do a 15 mph instead of a 40mph :screwy:

[HMGDRFTER]

Okay thanks all, really appreciate it
and THANKS ASE*TECH for neg repping? (lmk why)

[CeOTiO8]

Okay thanks all, really appreciate it
and THANKS ASE*TECH for neg repping? (lmk why)

It should say it... You can give neg reps without a reason :thinking:

[HMGDRFTER]

It should say it... You can give neg reps without a reason :thinking:

idk just says I, its okay i think i know why already but just wanted to 100% confirm.

[88civic_hatc]

bump for m.c. leaking probly folded the seals back when u pushed the piston back in the caliper