hello there, Having an issue with my 87 yj,loss of brake pressure. Well i was driving and all of a sudden i lost break pressure and when i let off the gas it pulled to the right, not all the time about every blocks, and the right front wheel would make a grinding noise, so what i did first was check the pads, all good except the outside one, had uneven wear,1/4 inch to 3/16, so i then changed them, same issue, i then changed the caliper, bleed all lines, still makes noise still loss of pressure but dosent pull as bad, proceded to change master cylinder, great pressure with plugs in, hooked up bleed system, more pressure now, still pressure loss down to nothing every little while, stilll scratchy noise, changed all pads front and rear , bleed a few times good pressure but pressure loss when driving, have to pump to get pressure back, but can barely stop, checked vacuum line, good seal, im now lost and wondering what im supposed to do now