1991 buick park avenue brake problem had busted brake line on drivers side rear brake so i fixed it then bleed the brakes.aint getting no brake fluid comming out of the passenger side rear so took of the hard line just befor the brake hose and still nothing.also the passenger side front brake has lots of air in it and cant get it out used a half of a big bottle of brake fluid and still getting air and fluid.the drivers side front brake bleeds just fine as well as the drivers rear.checked the master cylinder and its good has plenty of preasure coming out of it.brake pedal goes to the floor? and not leaking no fluid nowhere.I used a compression fiting to fix the busted brake line so im not too sure whats going on got pressure on drivers side but not on passenger side.

Hi Chris, The brake system is basically very simple. If you have duel braking on your vehicle, the usual method is having two brakes operate on the front with for example the left rear and the other system will also operate two front and the right rear. This type of system will have two calipers on each of the front wheels. The tandem system works in a slightly different way, having the forward part of the cylinder pressurizing the rear brakes and the rear part of the cylinder pressurizing the front. I think under the circumstances you are describing, I would have a friend sit inside and pump the brakes repeatedly until the system becomes pressurized (maybe twenty thirty times of pumping the brake pedal) and then ask him or her to keep it pushed firmly down until you find out where its leaking. The amount of brake fluid you report having been sed would indecate a severe leakage. Check the lower parts of the rear wheels for signs of leaking wheel cylinders and then dito for the front wheels. Any signs of wetness at these areas and along the brake system (the plumbing or pipe work) will indicate where the leakage is. If you cannot identify a wheel which is leaking, carefully inspect around and blow the master cylinder and if this no sign go along the fluid lines, taking special note of where the damaged pipe was repaired. If there is a blockage in the line, air may be trapped at that point causing difficulty in pressurizing. Once the place of leakage has been identified it must be attended to before bleeding the system. When bleeding, begin with the wheel furthest from the master cylinder, and work your way back to the master cylinder one wheel at a time, until you reach the closest.Keep in mind that you may find it required to pump the pedal many many times before opening the bleed nipple.Regards John