You have to bleed all foour wheels, starting with the R/R, L/R, R/F and last L/F. Gravity bleed the rears first, by opening the bleeder on the calipers and removing the master resevoir cap. Let the fluid drip out consistantly and than close them off. Afterward start the bleeding procedure, and than last have the vehicle running while doing the bleeding once more. make sure you "move" a good amount of fluid through, because if the air is stuck up at the lines than it will take a good amount of fluid to "push" it out. If there is still no response to the bleeding the brakes will have to be "presure bled."
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