I think I have a bad brake master cylinder, some opinions please
04-07-2007, 07:04 PM
#1
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I think I have a bad brake master cylinder, some opinions please
The brakes work, but as I apply more pressure, the pedal travels to the floor and the ABS kicks in slightly.
I already tried bedding the brakeswith no luck.
System was flushed and filled at the dealer months ago.
Rotors aren't warped either, I have no shimmey or vibrations.
What do you guys think, and how hard is it to to fix?
I already tried bedding the brakeswith no luck.
System was flushed and filled at the dealer months ago.
Rotors aren't warped either, I have no shimmey or vibrations.
What do you guys think, and how hard is it to to fix?
04-07-2007, 07:12 PM
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bleed the f out of it. Start with the right rear and work closer to the master cylinder.
should do it unless there is something marginal with the hydraulics (which is verrry rare in these cars)
04-07-2007, 07:28 PM
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What exactly is happening? If it's going to the floor you could have air in the system or a bad
vacuum booster. Turn the car off and see if the pedal goes to the floor after you pump the power brakes out.
04-07-2007, 07:43 PM
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who knows if it was properly bled the 1st time. Pump the pedal when the car is off..
if it goes to the floor (it shouldn't) then it is definitely time for further diagnosis. Bleeding is the easiest.
04-07-2007, 07:56 PM
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What's happening is that when I apply my brakes with steady pressure
the pedal moves slowly to the floor, and then the ABS kicks in.
If I "double pump" the pedal rebounds and the ABS does not kick in...usually.
If I "double pump" the pedal rebounds and the ABS does not kick in...usually.
04-07-2007, 08:58 PM
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def sounds fluid/hydraulics related .. like Eris said ..fush it good
and go from there ..
how was it before going to the dealer ?
if it changed then .. they did something bad imo.
how was it before going to the dealer ?
if it changed then .. they did something bad imo.
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04-07-2007, 10:41 PM
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chance of a vaccum leak. Check the master level and all the likes and hoses. From there bleed them
you can also make sure that rotors are in spec with a mic...
front: 1.102" rear:.787"
Bleeding is: rr, lr, rf, lf
You dont need to bleed the abs.
But the pedal slowly going to the floor with steady pressure sure sounds like you have a leak in your master.
front: 1.102" rear:.787"
Bleeding is: rr, lr, rf, lf
You dont need to bleed the abs.
But the pedal slowly going to the floor with steady pressure sure sounds like you have a leak in your master.
04-08-2007, 04:07 AM
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Is your pedal "stepping" when you brake does the pedal give a firm feel then seem to yeild?
then firm up again? with the ABS kicking in you might want to think of something else. If you are stationary does your pedal sink to the floor? If it does go to the floor when stationary then you might need a master cylinder.