Brake issue

[civic402Lx]

95 civic gsr swap. 180k on chassis.
Replaced front brake hoses (L&R)
Replaced rear Left caliper

Bled system, 2 men method, never fail before. Ive bleed this car same way many time before. No different this time.
followed bleeding sequence from manual.

Brake is spongy after bleeding. Bled 5x. With car off and on. Made no different. Brake booster is good. Test it with car off by pumping couple time, pedal become stiff. So booster is fine. notice master cyl is leaking. Bought new one from autozone. Bench bleed it first. Install and bleed more. Still spongy. Took it to mechanic shop. Told them what I did. They bled it. Got a lil bit better but still not firm, still spongy. So the tried bench bleeding the master cyl AGAIN. Same. Then they reverse bleed it. Still same. No leak anywhere. They checked all over. Nothing wrong. Car will still stop, but I feel like I have to push the pedal all the way down. Mech think its because the master cyl was made in china, so the quality is poor and could be that the valving of the cyl is diff too. Tried the original master cyl on bench and its leaking fluid, so oem one is shot.

Any suggestion? If I adjust the pedal travel rod for the cylin would it make a different??
Running out of idea. No air in the brake system. The shop bled it over and over. Different way too.

All around disc brake, no drums. Valvoline synthetic DOT 3/4 fluid.

 

[sohclubkid]

if you have a vacume leak it can cause the pedal to become soft. also, what kind of lines did you buy and did you check for leaks at the new lines and new rear caliper and the hard lines that run under the car?

 

[RonJ]

Buy a new OEM master cylinder.

 

[civic402Lx]

if you have a vacume leak it can cause the pedal to become soft. also, what kind of lines did you buy and did you check for leaks at the new lines and new rear caliper and the hard lines that run under the car?

the hose i bought from rockauto.com . Raybestos i think. dont have the box in front of me right now.
did check all hardline for leak.. no leak..

i'm afraid i might have to buy a new master cylinder (oem).. *sigh* more money out i guess. funny cause i bought a clutch master cylinder from autozone and it work fine.. been over couple months already..

 

[civic402Lx]

did the lock up trick and it helped. re-adjust the ebrake tension and somehow that also help.
bout the lock up the brake trick. browsed youtube and saw EricTheCarGuy vid on how u can go to an empty parking lot, get some speed then slam on the brake. Locking up the front brakes. did that multiple times and the pedal feel less spongy now. not 100% like i want it to be but i'm ocd about that. Pedal is more firm at 1/2 way down.

so far so good.. i still have the stock MC, I'm thinking of Rebuilding it. Rebuild kit from Dorman is $30. so in the future if i want to, i can swap it out. but for now, i'm good with where it's at.