Sorry, still new at this a bit.. The pedal goes almost to the floor, and the last 1 1/2" the pedal gets harder and begins to feel almost 'normal.. but on gravel, the rears are locking up quickly. I still can't tell if the fronts bare working, but the rears will lock up.
A little deeper history.. years ago after an incident crossing some RR track in the rain, the RWAL system almost got me into a rear-ender, so I disconnected the 'system' by pulling the 20A fuse and removing the dash bulbs for 'Brake', and 'ABS'.. I recently, after the 1st brake job, (a year ago), put everything back to stock config., and the brakes felt 'normal' but the RWAL system was not working, (w/ BRAKE and ABS lights on), and rears would lock up 'early', and then to complicate things, in short order, the front end would shake like crazy after about 10 miles and would get worse. As the brakes (front) would heat up even further). As the months rolled by, that problem would 'lessen' slightly, but would still get bad after several miles and moderate brake use. That turned out to be a right front (cheap) caliper was sticking badly, (and the left front also but not completely), and cooking the brakes, so I did a complete brake job again, including (another) master cyl, booster, rotors, [better] calipers, pads, rear drums, rear shoes AND installed 1 ton rear wheel cyls. Now, after this 2nd brake job, the pedal was going almost to the floor before beginning to act 'normal', and it seems like I could not get all the air out of the system. (At least that's what it felt like).. Bled these brakes many times.. no luck. (I had read that is is difficult to get all the air out of the combination valve and / or the RWAL valve..?).
I think ?? the combination valve is stuck, but I'm also not dissuaded from thinking there is STILL air trapped somewhere.. I don't know, and, of course, you can't get a new valve, (or a used one, for that matter), anywhere.
Sorry for the long discription.. but I'd appreciate any suggestions.. and I'd really like to know if anyone has tried to take one apart?..