Took it to the shop for two days and they changed the front caliper and brake pad. But the front right caliper doesn't gravity bleed or rotate because the caliper is grabbing. Just one side is grabbing.
So they suspected it was clogged they unhook the valve from the proportional valve to the front right caliper and blew air into it. Then we blew air into the proportional valve to the master cylinder and it un clogged. Hook it up and it started dripping then they hooked it up and it started gravity bleeding. But not shortly it stopped dripping and didn't gravity bleed and the caliper is slowly sticking.
What is the issue, my mechanics don't know what to do? Is it the proportional valve that needs to be fixed/ or replaced. If I replace it I have to get one from an car part because I don't have money to afford a new one atm. Or is it the whole brake system that needs to be bleeding and rid of toxic and sediment.
*Note the car has been sitting in a yard for two months
*Rear left bleeder valve nut is broken so I have to replace that before doing an entire bleed procedure.
*Replaced both caliper and break pads.