Losing brake pressure while braking, but not due to fluid loss
06-06-2002, 03:26 PM
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Losing brake pressure while braking, but not due to fluid loss
Okay, this problem has been occurring for the past couple of days.
When I start the car, the brakes are perfect. However, after a while of driving, and when i press down on the brakes, my car will still slow down, but my foot will slowly depress farther and farther down until i touch the ground. I am not losing any brake fluid, since it is still full.
I don't feel real safe when this happens, because I feel that I wouldn't be able to stop in a hurry if something comes my way.
My guess, is that the brake booster is going bad. I just recently converted to the 1" integra MC/Booster, so could there be a problem there.
Also, if it is the booster, is there any way to fix it, or do I need a new one?
Also, if I do need to replace it, can I replace the booster without having to take out the brake lines of the MC and having to bleed the lines?
TIA
When I start the car, the brakes are perfect. However, after a while of driving, and when i press down on the brakes, my car will still slow down, but my foot will slowly depress farther and farther down until i touch the ground. I am not losing any brake fluid, since it is still full.
I don't feel real safe when this happens, because I feel that I wouldn't be able to stop in a hurry if something comes my way.
My guess, is that the brake booster is going bad. I just recently converted to the 1" integra MC/Booster, so could there be a problem there.
Also, if it is the booster, is there any way to fix it, or do I need a new one?
Also, if I do need to replace it, can I replace the booster without having to take out the brake lines of the MC and having to bleed the lines?
TIA
06-06-2002, 07:15 PM
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Re: Losing brake pressure while braking, but not due to fluid loss (dnt94civic)
either your MC is going bad or you need to bleed brakes. or get some ss brake lines.
06-06-2002, 09:56 PM
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Re: Losing brake pressure while braking, but not due to fluid loss
Hmmmm..... sounds like the secondary seal in your master cylinder is going bad....or the primary. Either way its a master cylinder problem if there is no external leaking.....must be an internal problem.....im pretty sure of myself considering i just took the state of michigan brake test and got 98% 
If you can pump it up there is air in the system but if you apply and it slowly sinks...master cylinder almost every time .....there ya go. Ryan
If you can pump it up there is air in the system but if you apply and it slowly sinks...master cylinder almost every time .....there ya go. Ryan
06-07-2002, 05:04 AM
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Check your MC...
I just changed my yesterday, and the gasket sealing the MC was full of gunk, which was causing the brake system to lose pressure. If you've already replaced the MC, bled the brakes, and have found NO LEAK, then there might be a few issues:
1) Did you bench bleed the MC prior to installation?
2) Did you get the gasket backwards? They are directional, one facing the MC,
one facing the booster.
3) Maybe there are still some air trapped in the lines.
Best of luck,
-Jeff
1) Did you bench bleed the MC prior to installation?
2) Did you get the gasket backwards? They are directional, one facing the MC,
one facing the booster.
3) Maybe there are still some air trapped in the lines.
Best of luck,
-Jeff
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