I have a 1998 acura 3.5RL with the drivers rear brake pads dragging. This model has emerg. brake on front caliper, so its not that. I have checked and lubed all appropriate parts, and replaced the brake hose. Any ideas on what to do next?

 

Could be the master cylinder if it's not the caliper. It may not be allowing the pressure to release off of that corner. With that said, it could also be the proportioning valve. Just need to keep eliminating the potential problem areas until you figure it out.

 

prolly not the proportioning valve...it takes high fluid pressures to activate it at all, and it would prolly effect both sides. look at your slides/pins...they may be sticking...or possibly a damaged square cut O-ring...clogged ports inside the cylinder maby...how the condition of the fluid??