Honda Accord (1990 - 2002) Includes 1997 - 1999 Acura CL

brake pressure problem

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Old Aug 31, 2005 | 02:31 PM
  #1  
scrubachu's Avatar
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Default brake pressure problem

my car loses brake pressure when im at a stop and i turn my wheel all the way to the right, as when im trying to park. it doesnt happen when i turn the wheel all the way to the left, and does not happen when i am moving.
i have replaced the driver side brake line, there is no leak (ive checked), and checked the passenger side line and it is fine. i put the car on jack stands and took the wheels off and turned it all the way both ways. both retained full pressure. its only when the tires are on, and im turning to park slowly or at a stop. the MC has been replaced and bled properly. ive checked the lines when turning the wheel to make sure they arent pinching, which they arent. both lines have free movement when turning either direction.

and ideas??? power steering has been removed for over 4 years, and this is a recent development.

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Old Sep 1, 2005 | 02:23 AM
  #2  
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Default Re: brake pressure problem (scrubachu)

your prop valve might need to be replaced.
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Old Sep 1, 2005 | 04:03 AM
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Default Re: brake pressure problem (eg6sir-s)

prop valve? are you referring to the brake booster?
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Old Sep 1, 2005 | 06:31 AM
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Default Re: brake pressure problem

mine does that to but not when im turning just after im stop for a while then i have to let off and press again to tightin it back up :-/ i was going to get my system flushed and rebleed i dont know what else to do
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Old Sep 1, 2005 | 08:12 AM
  #5  
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Default Re: brake pressure problem (egzo04)

i had the same problem as you did egz, and i replaced the brake MC, which fixed that problem. now its just the full slow right turn problem
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Old Sep 1, 2005 | 08:42 AM
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Default Re: brake pressure problem (egzo04)

Your problem: you need a Master Cylinder and soon. You're suffering with a condition called internal bypass. If I can scare up my explanation it will become a LOT clearer

Here you go:

"In effect, Brake fluid is alcohol based; and because of that - over time it absorbes water. Once it reaches a super saturated state (and can no longer hold the water in suspension), the water puddles to the bottom of both your Master Cylinder, Rear Brake cylinders, Calipers and Brake lines. And it starts to rust. The condition will continue to progress to the point where finally, the water will have rusted out a trough on the botton of what's supposed to be a circular bore. Now being egg shaped and irregular, the brake piston seals (in the MC) can no longer seal against the walls, and there you are -BYPASS-. The pedal goes to the floor.
Thats why, buried in the owners manual (we all read the owners' maunal, right?) is a note to power flush the brake system occasionally. I do it every 60k."

Please don't let it go too long, one day the brakes will completely go away.......

P

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Old Sep 1, 2005 | 10:11 AM
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Default

Hondas have brakes???
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Old Sep 1, 2005 | 10:17 AM
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Default Re: (Blown02Stang)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blown02Stang &raquo;</TD></TR><TR><TD CLASS="quote">Hondas have brakes???</TD></TR></TABLE>

at least i can drive to work and back without filling up my gas tanks you ******* tool
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Old Sep 1, 2005 | 10:23 AM
  #9  
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Default Re: (fw190bvi)

i stated in the OP that i replaced the brake MC maybe a month ago. it is brand new, not reman., and i replaced the driver side front line. as i say again, it only happens when im at a dead stop or slow parking situtation turning the wheel completely to the right. it does not lose pressure in any other situation., which is why i thought it was a pinched line. after putting the car on stands and pulling the wheels, i turned the wheel both directions to the max, and neither line is being pinched.

next suggestion?
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Old Sep 1, 2005 | 12:05 PM
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Default Re: (scrubachu)

Sorry, I got carried away answering egzo04's problem.

With regards to your problem, I have NEVER run into, nor heard of this problem.
The brake system is a "closed system" and does nothing more than transfer mechanical force by pumping fluid.
The only traditional reasons for a Master Cylinder to loose a pedal are
1) Internal bypass (bad M/C)
2) Leaks (loss of pressure)
3) Grossly misadjusted rear drum brakes (too much travel)
There is no accumulator, everything is hard mounted, nothing moves or changes with suspension movement...
Except the front and rear brake hoses.
I've heard of brake hoses forming a bubble, just before failing. That "could" cause a spongy pedal, but it would do it <U>whenever</U> pressure was applied.
As a COMPLETE shot in the dark, I'd suggest installing Stainless Steel brake hoses as an upgrade (I did), or replace the R/F front brake hose at the minimum (you've already replaced the L/F hose, Right?).

P

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Old Sep 2, 2005 | 03:53 PM
  #11  
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Default Re: (P_Adams)

yea, the left front line has been replaced, and ive never heard of this problem either, which leads me to think its the right line. or still a strange pinch in the line, although ive cheked it with the car in the air... strangest thing ive ever seen. just really dont feel like gettin dirty again this weekend.....
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