I own a 91 xj with that experimental abs system. I stripped it out and added a booster, master cylinder, proportioning valve, and new lines. I rebuilt the rear brakes fully. Test drive for ten minutes everything seemed great then the calipers locked on in the front. It seemed like the right one more so, so I replaced it and drove for fifteen minutes and seemed fine and locked on again. This time both wheels smoking lol. Any help be appreciated.

 

did you replace the brake hoses. if not may need them