hey 95 civic cx , weird pedal feel . Bled the system pedal is a little bit spongy but not bad . when i start the car the pedal goes to the floor ? we replaced the master and booster still same problem ! i think we've bled the systeme 10 time now going from LR RR RF LF ! dont know whats going on ? have anyone everhad this issue ? maybe the proportionaing valve is toast ? cuz i know the guy i bought it from was driving it with a cut brake hose leaking all over !! any help grately aprecciated !! thanks !

 

You might still have air in the system. Did you bench bleed the master before putting it on? Do you have drums on the back, if so check the wheel cylinders for leakage, check brake lines ect. Than bleed the system in this order (PR,DR,PF,DR). Remember to keep topping off the master as you bleed. Have the cap on if you have someone pumping the pedal, cap off if you are going to gravity bleed. Good luck and have fun.

 

hey ! thanks for the tp but we did bench bleed the master ! i dont know why te pedal goes to the floor only when we start ?!?!?

 

When the car is off its hard? and when u start it goes to the floor? Possible its the boooster. Was it a new or used booster? Also check ur calipers see if they are engaging. Iono i remember my buddy had the same issue with his 99 accord, But i cant remember what we change beside the booster.

 

it's possible you have a bad master cylinder, if there are no other leaks i'd bet on that. I had a problem that was very similar on my old eg8, seemed to bleed off pressure but there was no external leakage from the master, put on a new master and it was good to go.

 

it was a used booster from one of our many parts cars lol ! same for the master , i hate to buy a new master and have it do the same thing !! i bought the car for it to be a cheap summer car .. guess not lol

 

i have a similar case;hard pedal when car is turned off soft when turned on.My money is on the brake booster or seized caliper maybe?Car had no brake fluid in it when i got it making me think The brake booster is leaking or a line is/has air in it

 

never mind, if you actually put the check valve backwards, you will have a harder pedal feel, not softer. anyway, i would still test the check valve if it's working. When you blow air on the check valve, it should allow air one way, and not the other way.

 

my check valve has an arrow poiting to the motor ?

 

Mine only goes spongy after applying the breaks and coming to a stop, it will slowly go to the floor then I have it goes to the floor once or twice strokes then works fine again. Bleed the breaks to the moon, but never does my pedal drop to the floor when the car is started.

 

yeah its really weird ! never have i had this problems with honda's its either ALOT of air or booster or master maybe check valve ! il check tomorrow !

 

deffinetely a master cylinder prob

 

Either a defective master cylinder or a seized caliper. Does it loose brake fluid like theirs a leak somewhere?

Take the master cyl back and get another one and bench bleed it good and try it again. if the same thing occurs then take it to brake check and have them do a free check up on it. and they will let you know what caliper is screwed or whats wrong.

0, And it could also be a bad or clogged porportioning valve.

 

Yup, I am going to make it home before replacing it, then atleast I can drive the diesel to work lol.

 

hey thanks for the help ! im gonna try a new master cylinder for fun !! never know ! if not il have to try a protpotioning valve !! calipers dont seem seized at all ! they retract fine !