funny feeling brake pedal

[s2tommy]

hi everyone, i have a funny feeling brake pedal!! i have only got to rest my foot on the pedal and can feel it through my foot as it is pumping on and off as u would feel as the ABS is going off, and does not change if i push harder on the pedal?? the pedal is very hard and dont think i have got full braking power and have got the brake warning simball on the dash from start up! Anyone got any ideas or test i could do??
cheers tom

[A80Avant]

looks like the pressure accumulator is about to be going out, or dead already. (brake bomb). Custom autocrafts has spares at a good price.

[Error404]

dying servo

[A80Avant]

you think?
i get that feeling on my pedal when i turn the engine on for the first time, until pressure is build up, (not always) and my servo is brand new!

[s2tommy]

dying servo? is that the brake bomb??

[s2driveruk]

yep mine does that when i first pull away which i think is absolutely fine...basically the system building up to full working pressure, usually with a small noise

[A80Avant]

you think?
i thought that was abnormal!!! if so, then i may not need a new bomb afterall, but i dont remember having that in the past.

[Rusty]

Servo. Change the fluid in the system, might help, as it did on mine. Bomb test is on s2central

[A80Avant]

bomb test with the s2central technique gives me about 5-7 presses. so that is low.

i may change the bomb after a complete caliper overhaul and rebleed.