brake pedal goes down to the floor, can't figure out Y ?help?
12-25-2004, 07:12 PM
#1
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brake pedal goes down to the floor, can't figure out Y ?help?
Ok, 2 days ago (coldest morning) i get in my car, brake pedal smooshes all the way down before the brakes stop the car,(wtf is going on!!! they always felt stiff) So i brought it to my friends shop we lifted it.. checked for leaks for 20min... nothing... drained all the fluid out of the brake system filled it up and blead it for about 2 hours....the car drove home, and the brakes felt like crap for the first 5 sec. then they stiffend right up,(20 min. drive home they felt perfect) I was all happy, thinking i fixed it... WRONG, today got in the car brakes felt like crap again...
-when the key is in the "ON" position, and i pump the pedal up it stiffens... but not super stiff, still mushy.
-does this sound like a master cyl problem?
-when the key is in the "ON" position, and i pump the pedal up it stiffens... but not super stiff, still mushy.
-does this sound like a master cyl problem?
12-25-2004, 07:15 PM
#2
when the car is off your vacuum assist is off because the motor is not on. when you start the car the vacuum kicks in. if it goes smooshy when the car is on then the master cylinder is most likely at fault....
12-26-2004, 07:02 AM
#6
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i understand it could be an "internal" leak, where fluid is getting past seals at points. but...
How do u guys explain the "temp. fix" after i flushed and bled the system,they worked like new for a day...
anymore thoughts...??
How do u guys explain the "temp. fix" after i flushed and bled the system,they worked like new for a day...
anymore thoughts...??
12-27-2004, 12:14 AM
#10
I'm sure they are greatly appreciated. No denying that.
But maybe I'm the only one who gets tired of seeing the peeping face over the wall and "i sell x object" in virtually every thread where anyone may even remotely possibly need a part. I mean, everyone already knows he sells everything under the stars..
But maybe I'm the only one who gets tired of seeing the peeping face over the wall and "i sell x object" in virtually every thread where anyone may even remotely possibly need a part. I mean, everyone already knows he sells everything under the stars..
12-27-2004, 03:11 AM
#11
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everything under the stars! LOL
Some one answer my question..
edit: oh yeah i might have an interview for a job in a taxi shop, part-time, pays good and i get to use the shop anytime i want, BUT how the hell am i going to get their in the snow.. with no brakes....
Some one answer my question..
edit: oh yeah i might have an interview for a job in a taxi shop, part-time, pays good and i get to use the shop anytime i want, BUT how the hell am i going to get their in the snow.. with no brakes....
12-27-2004, 04:29 AM
#12
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Originally Posted by ChrisCheezer
everything under the stars! LOL
Some one answer my question..
edit: oh yeah i might have an interview for a job in a taxi shop, part-time, pays good and i get to use the shop anytime i want, BUT how the hell am i going to get their in the snow.. with no brakes....
Some one answer my question..
edit: oh yeah i might have an interview for a job in a taxi shop, part-time, pays good and i get to use the shop anytime i want, BUT how the hell am i going to get their in the snow.. with no brakes....
I've once had a std brake new leasing Ford escort. Started in the British Windsor morning: first stop the pedal clunked to floor, pumping brakes became 'on', and no problems afterwards. Changed the car, but leasing company did not believe mee... "no problem they said, such problems do not exist."
The ABS is very complex piping system, too many places for air to hide. What else could it be than air? Brakes do faint if water is in the system as they boil on hard braking. Seals could leak but that most probably be constant.
How about the ABS control. If it detects slippage, it opens that circuit, losing brake pressure on that line. Now if the ABS computer fails, or some seal for the system, would it result in complete brake loss? Any error codes?
If it was known which pipes are constantly pressurized, I would loosen that/those pipes connections in the ABS assy, just to bleed a little.
12-27-2004, 04:56 AM
#13
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i understand it could be an "internal" leak, where fluid is getting past seals at points. but...
How do u guys explain the "temp. fix" after i flushed and bled the system,they worked like new for a day...
anymore thoughts...??
How do u guys explain the "temp. fix" after i flushed and bled the system,they worked like new for a day...
anymore thoughts...??
Worth checking - had it on another vehicle of mine (Golf) - as an added bonus - booster rubber diaphragm seal gets nice and slippery/expand from the now "not designed for brake-fluid" presense and it gets sucked right out of the intended place of work - resulting in a replacement booster required (expensive!)
12-27-2004, 06:23 AM
#14
Originally Posted by LvR
You are now he proud owner of a nearly full brake booster ?(duff seals leaking fluid to master cylinder side of the unit).
Worth checking - had it on another vehicle of mine (Golf) - as an added bonus - booster rubber diaphragm seal gets nice and slippery/expand from the now "not designed for brake-fluid" presense and it gets sucked right out of the intended place of work - resulting in a replacement booster required (expensive!)
Worth checking - had it on another vehicle of mine (Golf) - as an added bonus - booster rubber diaphragm seal gets nice and slippery/expand from the now "not designed for brake-fluid" presense and it gets sucked right out of the intended place of work - resulting in a replacement booster required (expensive!)
........
12-27-2004, 06:29 AM
#15
Originally Posted by James92SE
I'm pretty sure this is 80% of your posts..
I do it because
a. it's how I manage to pay for my car
b. there are always new people joining so not everybody realizes that I sell parts
c. A lot of members don't realize just how deep my parts coverage is.
d. it's fun to do and helps my post count
12-27-2004, 06:29 AM
#16
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Originally Posted by LvR
You are now he proud owner of a nearly full brake booster ?(duff seals leaking fluid to master cylinder side of the unit).
Worth checking - had it on another vehicle of mine (Golf) - as an added bonus - booster rubber diaphragm seal gets nice and slippery/expand from the now "not designed for brake-fluid" presense and it gets sucked right out of the intended place of work - resulting in a replacement booster required (expensive!)
Worth checking - had it on another vehicle of mine (Golf) - as an added bonus - booster rubber diaphragm seal gets nice and slippery/expand from the now "not designed for brake-fluid" presense and it gets sucked right out of the intended place of work - resulting in a replacement booster required (expensive!)
12-27-2004, 06:30 AM
#17
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Originally Posted by internetautomar
Boosters aren't all that expensive, they're like $95 plus a $50 core.
........
........
12-27-2004, 06:31 AM
#19
Originally Posted by LvR
Sure, sure.................... but then again I like to do something useful with my $150 if its at all possible - something like a case of Jack Daniels or something similar?
12-27-2004, 06:38 AM
#21
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no.. i read it 3 times and still didnt understand, but its not your falt... im a moron.
-i dont have abs... should of said that in my first post... doh!
- just wanted someone to explain to ME what you said, because i dont know how thoes parts work,
.... internetautomart, did that
-what should i do to find out if the master or booster or both should be replaced?
-i dont have abs... should of said that in my first post... doh!
- just wanted someone to explain to ME what you said, because i dont know how thoes parts work,
.... internetautomart, did that
-what should i do to find out if the master or booster or both should be replaced?
12-27-2004, 06:40 AM
#22
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Originally Posted by ChrisCheezer
no.. i read it 3 times and still didnt understand, but its not your falt... im a moron.
-i dont have abs... should of said that in my first post... doh!
-i dont have abs... should of said that in my first post... doh!
ABS has nothing to do with it at all.
Later
AH ok - Master cylinder has a rear seal responsible for keeping the brakefluid inside the master cylinder - if that seal starts leaking (usually slow) the only place the fluid has to go is the front chamber of the booster - leave it long enough (in your case overnight) and if its bad enough, all of the fluid out of the reservoir and the master cylinder will drain out into the booster (read no or low brakes) and the best external inspection will not detect a single leaking drop at all..........
12-27-2004, 06:44 AM
#23
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Originally Posted by LvR
Do you understand why I suggested or not? - not being nasty at all.
ABS has nothing to do with it at all.
ABS has nothing to do with it at all.
12-27-2004, 06:46 AM
#24
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ok but that sounds like both would have to be replaced right?>
Originally Posted by LvR
Do you understand why I suggested or not? - not being nasty at all.
ABS has nothing to do with it at all.
Later
AH ok - Master cylinder has a rear seal responsible for keeping the brakefluid inside the master cylinder - if that seal starts leaking (usually slow) the only place the fluid has to go is the front chamber of the booster - leave it long enough (in your case overnight) and if its bad enough, all of the fluid out of the reservoir and the master cylinder will drain out into the booster (read no or low brakes) and the best external inspection will not detect a single leaking drop at all..........
ABS has nothing to do with it at all.
Later
AH ok - Master cylinder has a rear seal responsible for keeping the brakefluid inside the master cylinder - if that seal starts leaking (usually slow) the only place the fluid has to go is the front chamber of the booster - leave it long enough (in your case overnight) and if its bad enough, all of the fluid out of the reservoir and the master cylinder will drain out into the booster (read no or low brakes) and the best external inspection will not detect a single leaking drop at all..........
12-27-2004, 06:48 AM
#25
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Originally Posted by ChrisCheezer
ok but that sounds like both would have to be replaced right?>
12-27-2004, 08:05 AM
#27
Originally Posted by ChrisCheezer
ok, thanx for the info....
-why the heck is this happening now.. im so close to getting my ve5!!!!!!!
-why the heck is this happening now.. im so close to getting my ve5!!!!!!!
12-27-2004, 09:11 AM
#28
Master cylinder. Read the chilton stickie on replacement. Or just have the mechanic handle it as you already go to a mechanic anyway. It would seem he would be the one responsible for diagnostics anyway.
12-27-2004, 09:29 AM
#29
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Originally Posted by Jeff92se
Master cylinder. Read the chilton stickie on replacement. Or just have the mechanic handle it as you already go to a mechanic anyway. It would seem he would be the one responsible for diagnostics anyway.
never brought my car to a mechanic once... oh wait, I lie. I had to get an alignment, about a year ago.
12-27-2004, 09:31 AM
#30
So i brought it to my friends shop we lifted it.. checked for leaks for 20min...
Originally Posted by ChrisCheezer
never brought my car to a mechanic once... oh wait, I lie. I had to get an alignment, about a year ago.
12-27-2004, 09:50 AM
#31
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why can't we all just get along,... I'm not going to sit here and try to defend myself against someone who has their heart set on picking fights...
-but because I put countless time and hard work into this car (like many others), I feel the need for some appreciation, but obviously I should be looking someplace else for that...
sry but when u said i bring my car to someone to fix, it hurt
-but because I put countless time and hard work into this car (like many others), I feel the need for some appreciation, but obviously I should be looking someplace else for that...
sry but when u said i bring my car to someone to fix, it hurt
12-27-2004, 09:52 AM
#32
I'll take that as a "no" hehe.. Just joking. Did you see the part where I mention MASTER CYLINDER?
Originally Posted by ChrisCheezer
why can't we all just get along,... I'm not going to sit here and try to defend myself against someone who has their heart set on picking fights...
-but because I put countless time and hard work into this car (like many others), I feel the need for some appreciation, but obviously I should be looking someplace else for that...
-but because I put countless time and hard work into this car (like many others), I feel the need for some appreciation, but obviously I should be looking someplace else for that...
12-27-2004, 10:03 AM
#34
Originally Posted by ChrisCheezer
after i bench bleed do i have to rebleed the entire system...
-its starting to snow.. and i dont have brakes... this isnt good....
-its starting to snow.. and i dont have brakes... this isnt good....
Aside note: the last mc I replaced I diag'd as bad when I tried to bench bleed it. I closed the system and put pressure to the piston. It leaked passed the seals inside allowing the piston to slowly depress. Yet another reason for a bench bleed.
12-27-2004, 10:43 AM
#36
Originally Posted by ChrisCheezer
good idea,
i understand what u mean, it is very cold outside. ill probly do it in the shop, if i can get the car there...
thanx.
i understand what u mean, it is very cold outside. ill probly do it in the shop, if i can get the car there...
thanx.
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