My front brakes have been dragging for two years. I have gone through 2 sets of pads and replaced both rotors. Additionally my gas mileage has dropped probably 2 mpg. To combat this I have changed the master cylinder, cleaned and lubed the caliper pins, rebuilt both calipers, changed both flexible brake lines, adjusted the brake booster push rod several times, and bled the brakes countless times. The pads are still dragging, the hubs are burning after driving around over a few miles, and I have a burned brake smell after driving around for a few miles. My next try to to buy some rebuilt calipers. I am getting frustrated on this one. Any suggestions?