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Brake Master Cylinder PROBLEM!!!

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Old 09-18-2003, 12:07 AM
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Default Brake Master Cylinder PROBLEM!!!

im guessing its more of a brake booster prob....Help

1995 Integra RS brake booster and master cylinder

Problem: when braking under normal driving, brakes fine,stops fine, BUTat a stop (when car just sits), while the pedal is being pressed......slowly sinks toward the firewall, when pedal is released.....comes back up...car still brakes and stops and slows down, cant pace a stop correctly if pedal sinks down

already bled brakes all around....there's fluid
Old 09-18-2003, 01:07 AM
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Default Re: Brake Master Cylinder PROBLEM!!! (mr_timluu)

This sounds like a vacuum problem with your brake booster.

I would first try replacing the vacuum hose running from your Intake Manifold to your Brake Booster. It runs right near the firewall on the back on the IM.

If you're still having problems try to see if you can visually spot any brake fluid leaks around the Master Cylinder. Check from the Engine Bay, and from up above the brake pedal as well.
Old 09-18-2003, 04:00 AM
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Default Re: Brake Master Cylinder PROBLEM!!! (mr_timluu)

bad booster leaking fluid around the piston internally
Old 09-18-2003, 04:26 AM
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Default Re: Brake Master Cylinder PROBLEM!!! (realblag)

Have you replaced your Brake Master Cylinder? That is what sounds like the problem is.
Old 09-18-2003, 08:32 AM
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Default Re: Brake Master Cylinder PROBLEM!!! (2camsaam)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2camsaam &raquo;</TD></TR><TR><TD CLASS="quote">Have you replaced your Brake Master Cylinder? That is what sounds like the problem is.</TD></TR></TABLE>

yup sounds like a MC problem. You can rule out the booster by pumping the brakes with the car off, if the pedal stiffens up until it almost won't move, then your booster is ok.
Old 09-18-2003, 10:03 AM
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Default Re: Brake Master Cylinder PROBLEM!!! (mr_timluu)

I had the same problem I changed the master cylinder and problem solved
Old 09-18-2003, 10:05 AM
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Default Re: Brake Master Cylinder PROBLEM!!! (WhItE99CiViC)

I hope for your sake its just the MC and not the booster. The boosters are a real bitch to replace.
Old 09-18-2003, 11:55 PM
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thanks for the info.......just bought a replacement MC .....i dont think it was the booster......tried that method to check the booster...booster seems fine.....going with MC first....thanks
Old 09-22-2003, 04:49 PM
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Default Re: (mr_timluu)

hmmm sounds like a bad problem
I just got my car back and now when i brake the pedal pretty much hits the floor
it stops but its a bit scary to do so
Im thinking its the MC
hence time to replace
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