What would stop the front brakes on an 91 civic dx from relaeseing pressure when you stop???....plesae help....this what I have change and tried....brake booster,check valve,brake lines,front calipers,front pads,master cylider.

 

1st guess...collapsed brake line

 

soft brake lines change on both sides....???? any other ideas??

 

je4z dude. you've replaced everything.....

make sure your booster valve isn't on backwards. i'm not exactly sure what would happen, but it might be that....

does your pedal come back up after you're done braking?

 

Checked that twice and again....when I swapped brake lines the new ones were not new they came off my crx that I'm building so I went ahead and ordered some russell stainless steel lines yeasterday so waiting on them to come in I guess I'll see then but this is crazy I've been fighting with this for 5 days now could have done a motor swap instead!

 

Can it be the proportioning valve? Does something like this go bad?

 

if the brakes are not releasing and you have changed all of those things then i bet it is moisture in the lines. as the water heats up it expands. Bleed correctly making sure to run allllll the old fluid out. then bleed again. then drive.

 

Thank you I'll try that.

 

When you bleed

pay attention the the collor of the fluid.

fresh fluid is MUCH different color than old fluid, especially with water in it.

get ALL fluid out

 

I think you guys are right the old fluid is much darker than the new does that mean theres water in it? I don't know much about brakes thats why I'm asking,but this has been a learning exp. I going to completely drain out all brake fluid and go from there, we did the front but not the back so I'll try that and let you'll know thanx again for the help.

 

Ok I got all the old fluid out and it help alot but did not slove the probelm,on a good note it did make somewhat of a change,so I think that was part of the problem the brake fluid was like dark brown,not a pee like color but she's good on that now,so I guess I'll try the stainless steel brake lines tomorrow and keep you'll posted,did I mention this a is a nightmare!

 

i'd unbolt the mc from the booster and pull it forward. if the problem goes away then adjust the booster pushrod. hth.

 

See this is whats up when I got the car this was the problem with the car the brakes thats why I bought a new booster so I really don't think thats the problem but I'll take a look see away thanx.

 

Sorry to bring this back up guys,and you'll have been very helpful,but this damm car hates me it's still do the same thing.I've done evrything in this post and more so I' m reaching out for anybody with maybe a another idea before I bring it to the shop (SUCKS) what could cause this I'm lost, I mean this is a 91 civic not 06 civic not very much to the brakes.Again the problems I'm haveing is that after about 15 min of driveing the padel gets hard and the brakes are dragging real bad to the point where I have to get the car and release the check valve to relaese pressure and then I can go on for a min before I have to do the same thing.

 

OK check this out, took off the check valve works fine now,but can this cause any harm to the brakes or me driveing with no check valve??