i bought a powermaster pump from a guy on this board cuz the old one cracked. now, its just that there is a delay in braking, like before the crack. how do explain this, when i step on the brake to stop, there is a 1-2sec delay before it begins to stop. the pedal goes down slightly during the delay the brakes normally after. does anyone know what this is. could it be the accumulator? or the pressure switch? the powermaster pump works great. all help is appreciated.