See picture. Wouldn't move past that point in the tube.

A thought - is the pedal definitely returning all the way to its mechanical limit? If the pedal is pressed even a tiny bit it will cut off the supply from the reservoir.

I'm just wondering if the brake light switch is adjusted too far down and preventing the pedal returning fully. That would explain why you can't pressure bleed it (and is the only thing I can think of that would behave like that) and it could be that it goes to the floor just because its full of air.

I would pop the driver's side lower dash off and back the switch right off to see where the brake pedal stops and see if that helps before changing the master cylinder.

Remember to re-adjust the switch properly afterwards though. They have two sets of contacts which have to change at the same time and the ecus get in a grump if they are wrong.

So even if master is gone, pressure bleeder should still force fluid through?

Well, with the failure mode I described, the seals have failed. 2 bar should blow fluid through it no problem, unless somehow the seal has disintegrated and got stuck in the hole, but that seems highly unlikely.

I had an issue bleeding the clutch on the manual swap which was like this. I'd got the pedal stop about 2mm out which was enough to stop the pressure bleeder doing anything. Once I adjusted it properly it bled fine. I'm wondering if you're seeing the same thing.

Pulled brake light switch outwards to make sure there is no pressure on the pedal and it can fully return. 2 bar in the brake fluid container and nothing. Not even a drop.

Brake fluid level goes up and down as I press it?

EDIT: pedal seems to be stiffer now as well? But like I said still nothing at the back caliper.

Decided to give her to my mechanic to sort out. Don't have time to deal with it myself and need it back by Friday.

New master cylinder has been fitted, and brakes working. Pedal is still quite spongy, is that D2 thing or should be firm? Autos are usually pretty harsh.

Non-Brembo brakes should be fairly firm. D2s are very hard to bleed properly though. Was the ESP pump cycled as part of the bleeding process?

No idea if I have to be honest. Grabbed the car and left :ROFL:

How is it done? :Confused: