Today I installed Stoptech steel braided brake lines, and changed the fluid to Motul. After I finished bleeding the brakes, I took the car out for a ride and had almost no pedal pressure whatsoever. In order to stop the car, I had to pump the crap out of the brakes.
Once I got home, I started thinking about the problem, which was also reported by another member. Apparently he fixed it by going for another drive and hitting the pedal hard a few times. I tried that, but to no avail.
Back home again, I decided that I must have f'd up the brake bleeding, and found the proper order and way to do it. After bleeding the brakes a second time (two bottles of Motul gone at this point), I took the car for another ride. No change whatsoever, and there was NO air coming from the brake lines.
There are two things that concern me at this point, and one of them may help lead to a solution to the problem. 1. The left rear brake had almost no pressure during the second bleeding. Even after ten pedal pumps, the fluid would just dribble out. 2. At one point during the first bleeding, I believe that I let the fluid get too low, and basically had to refill the entire resevioir.
After reading some more on endwrench.com, I learned that there is more to an ABS system than just a master cylinder and lines. There is a hydraulic unit which seems somehow bleedable, aside from using the caliper bleed valves. Is it possible that I got air in this hydraulic unit when the resevoir was emptied? Does anyone know how to bleed this thing? Are there any easy ways to check for leaks in the lines themselves?
I'm 99% sure that the lines have been installed correctly, and are not leaking, so this hydraulic unit seems like my last hope. If anyone can help, please do, because I need to drive back to New York (from Rhode Island) tomorrow, and I doubt that there will be many mechanics that can help me on Labor Day.