1988 Corvette Brake dragging

right front caliper is dragging, have installed new flex line and caliper, still dragging. If I release the bleed screw, pressure releases and wheel turns fine. Any suggestions???

rookie on vets but have done a few brakes have you tried using a c clamp n pump the pistons back in (maybe just hangin up on crud)

not the most familiar with the brake systems on the 88's, but for starters, if the caliper is new and the flex line is new(and not twisted up in any way), then i would say start looking at master cylinder. is possible the valve in it is sticking/or clogged and not allowing pressure to bleed back to master. if it has ABS/traction control(once again, not too sure about the '88 brake system), it could be a problem in the modulator valves. just tossing ideas out there to check. let us know what you come up with.