I'm still having that problem. I would drive for like 10-20 mins and everything would work fine. After that the brakes starts to lock up, only the fronts. I recently change the front calipers, and master cylinder ( brand new from autozone, a couple days old). I also changed the proportion valve. (this is like the 3 one off ebay). and I also change the booster. (2nd one). Now I'm totally stuck, I don't know what else to do. Is there something I'm missing? I bleed the brakes and fluid comes out, so I would think the lines are not clogged. Its like its getting brake fluid but its not returning the fluid???? Any help would be great. P.S. (if i crack the line for the front brakes to the proportion valve than the brakes would be free again (release pressure). But soon as I tighten it and drive again it would lock up again. PLEASE help!!!!

 

you have brake lines mixed up...poor guy..
at the prop valve double check. did you put the prop valve up side down...
how bout the brake boost vacuum hose. there is a check valve in the middle of that hose you can only put that on 1 way

 

okay, the check valve is on right (only goes oneway, and has alot of vacuum). The lines are mixed up??? its upside down??? I thought that only goes one way. (4 lines on the left side and 2 lines on the right side, looking from the front of the car). Anyone have any pictures?

 

here

 

ummm thanks but, that didn't help much since that's right hand drive and ur ***** is inside the car lol. Also mine's a 92 hatch with gsr front and rear brake swap. Any help anyone???????????

 

well heres the picture. i doubt its on wrong or backwards.

 

bumped .

 

anyone having this problem before? any help??? anyone?????

 

do you know which brakes are locking up?
i hope not the ones that you replaced
the piston can go bad in a caliper and stay locked up

 

What master cylinder r u using and prop valve

 

He's got a 13/16ths (I think) and a DA 40-40 prop valve. ...I've seen "Rick Rabies" car.

Will your front brakes return to the normal position at all? Try using a big C-clamp.
Dumb question, but if you pulled your brake booster hose off your intake, will the brakes still stay stuck?

Did this odd behavior start right after changing the brake master cylinder? What size is it? 13/16s, 1 inch? You could try your old BMC if you still have it, or I have one...

 

I'm using a 40/40 proportional valve (off a non-abs integra) and a 15/16 master (off a RS integra). They calipers are fine after i let it cool down the. and the piston on the caipers do retract after it cools down or if i open a bleeder to releive pressure.??? iono its killing me.

 

the calipers you replaced....are those the ones being stupid?
or is it the ones you didnt replace?

 

i think like what the other guy said you mite have switch the hoses around try that first

 

he did that, but wont answer my question.

 

im having a similar issue but its the opposite...I put TypeR 5 lug and typeR brake on the front of my EG SI and then kept the four lug and stock brakes in the back...NOW I GET NO PRESSURE unless I pump it up fast...then it getsa pressure...but I wait two seconds and then boom;....Nothing...IDK...I hate brakes...

 

The "front" one's are locking. Brand new calipers and brake hoses on the front. I posted the picture, is the proportional valve upside down???? doesnt look it. iono, I'll try filping it around tomorrow.

 

if i was you i would drain all the brake fluid(it can get real gross)
and refill and bleed the brakes again...

 

bumped!!!

 

Check the one way vavle that goes from your intake to your booster, it might be sticking. Also an obvious one would be the caliper pins, check to see of there clean and greased and are free and have good movement.

 

Thanks for the help chumps!! But for the record, Non of you guys was correct. Was not the calipers.

 

Good, im glad you troubleshooted that...

 

What was it?

 

If I tell u, I have to kill u. Since I been on honda tech, none of u guys was any help. All you guys do is replace parts ect. Well I guess that's a false statement cuz some information was helpfull, Like 2 outta 10 and that's bad.

 

So what was the problem bra?