brake pedal sinking

**yellows2k** · 10-02-2010 05:44 PM

hey, ive recently changed the rotors and pads on my front brakes on my eg5, i also did a brake fluid flush with all new fluid.
the pedal felt great for teh first 10mins, but it started to sink to the floor when pressed but if u pumped it, it would tighten up again, but then sink again
im guessing its the brake master cylinder thats gone.
what am i looking at? brake master cylinder, brake booster?

any advice would be appreciated

**Limbo** · 10-02-2010 05:47 PM

sounds like you've bleed incorrectly and there are air pockets,

Or leaking in the MBC, check for leaks

**ninzee** · 10-02-2010 06:12 PM

^^^^^
what he said either way fix it cause if u dont 1day u wont be able to stop

**CB7_OWNER** · 10-02-2010 06:29 PM

If it was workin fine before.. "chances" are that you didnt bleed properly and have air in system.

**VTi_b0i** · 10-02-2010 06:31 PM

i had the same problem, my brake master cyl was farked. but as others said, if u just did work on the system, id put money on it that its not been bled properly

**yellows2k** · 10-02-2010 08:13 PM

well, when i bought it, the pedals felt ok the first day, then the next day i noticed something funny and hence the problem being discussed. i then got the rotors and pads and new fluid service performed. and the pedal felt great for about 15 mins, then it sunk, so now im guessing its the brake master cylinder.

if thats the case, do i just need a new master cylinder or do i need the brake booster as well