[wolds]

I wouldn't drive it the way it is. You might want to flush the system with fresh fluid. After you have done this step, pull the pads out of the calipers. Then, one caliper at a time open the bleeder and see if you can get each piston to retract into the caliper body. Once you have done that go through the bleed process again starting at the right rear caliper, left rear, right front and finally left front. At this point you know that the pistons are free and that you have fresh fluid throughout the system. If this works and you now have a firm brake pedal you would be good to go for awhile. While doing this inspect your rubber lines running to each caliper for signs of wear or cracking. Ultimately it might be time for a caliper rebuild which if you don't want to do yourself, Eric of PMB Performance can. Warren