Could be air in the system and a quick bleed can verify that. However, all that braking probably wore the pads down and the pistons that would move slid out to the proper distance. There is probably one, or more, stuck or sticking pistons that are not moving out properly as the pads ware. Is there a pull to the brakes? Pop the wheels and check for pad wear. The one(s) with the least wear is your problem. You might try a panic stop push on the brake pedal (while parked of course) to see if the pistons will set themselves for a while - if they do the pedal will come up and be firm for a short while. If the calipers have never been rebuilt - then they are due. Harold McElraft - 3354 --- In dmcnews@xxxxxxxxxxxxxxx, "therealdmcvegas" <DMCVegas@xxxx> wrote: > Last August, I replaced my Brake Master Cylinder, and also flushed the entire hydraulic system with Castrol GTLMA (as stated in a previous post). And everything has been fine since then. > > Until last week...