Need some help here. 94 S4 with 48k I drove it last in July 45 miles got home all was fine parked her in the garage. In September made the plunge and put it up for sale took it out for a gas run and the front right brakes were locking up pedal got hard as a rock. Limped home .7 miles only to find the flex line on the right burst (still a puzzle) Got a line replaced it bleed brakes this past Sunday test drive the car and the pedal is as hard as a rock no boost. Under braking the car pull to the right very unstable. Any thoughts before I start looking in the wrong places Thanks all.