The indy shop tried pressure, pedal and vacuum bleeding without success. I've suggested the following:
- bench bleed master
- use GT1 to block off the ABS channels and see if issue(s) lie in master/abs circuits or in one of the channels somewhere after the abs
- bleed with vehicle running
- crack fittings at master and abs while bleeding under pressure
Any other ideas? What kills me is it had a good pedal, I tossed on new pads rotors, backed out pistons with bleed screws open not forcing up fluid and then pressure bled fresh fluid through the system (no pedal presses, just pressure and let it run through until clean). Pedal is mushy but stops when off and mushy but goes slowly to floor with medium, consistent pressure when vehicle on. It does still stop, because I had it out to bed in pads/rotors. I'm baffled as is the shop - and these guys have done nothing but BMWs for the last 25yrs.
The shop is also going to swap in a master they have and see if that does anything. Could have just freed up some gunk when I pressure bled it and messed up the seals. I'll keep everyone posted. If I ever get it working, I'll report findings and never touch the bloody brakes again
