brakes HELP please

[turbotony21]

i have a s70 t5 its mildly tuned but when im giving it sum beans sumtimes and i have to put brakes on then sumtimes peddle goes hard and i aint stopping pretty scary tbh anyone no whats causing this i no my front discs seen better days on outer edges but still wouldnt cause hard peddle


thanks

[Nealevo]

A hard pedal normally relates to the servo/booster having a vacuum issue, possibly a slight leak or old worn components.

[Saaamon]

My 850 has the same problem, think it mite be the one way valve that goes into the servo, looks discoloured/burnt due to heat. Haven't tried fixing it yet though as my car is in the naughty corner...

[turbotony21]

ok thanks ill check the pipes probably will be corroded like the rest of them were