hey guys

I just repair a friend of mine his honda civic ferio 97.

i put new pads on it
clean the caliper because the pistons were stuck

so i put every thing in place
but now the brake pedals will not come up it is very low when i press it.
i all ready let the air in the system out every brakes front and back and the brakemaster
but still the brakes are low.
it holds but the pedals are low