My pedal goes almost to floor but car stops with powermaster

[Mark Parks]

Would the problem be the accumulator? Or something else? My other GN had more brake pedal.

 

[Buckshot G/N]

Could Be the accumulator, have you change the brake fluid lately , dirty fluid makes the powermaster system react strange sometimes ,pump your brake system 10 times and retract the fluid from the accumulator to fill the fluid container.
, ,rear brakes could need adjusting,are is there any leakage around the rear cylinders ??