Long story short, after a failed attempt to go from big brakes back to stock (had the front calipers disconnected, then put back on, which in itself is probably a non-issue) was running ATE blue fluid. Flushed out most of it for off the shelf dot 3 fluid... and had zero brakes afterwards, pedal was pretty much zero resistance to the floor. The one thing I didn't do was disconnect the battery so the ABS reservoir would flush out.

Any ideas on this one? It's actually at a Firestone shop as we speak, they can't make anything of it either, which makes me feel a little better, except next step for them was to change the master cylinder out.

Any ideas here? Mixing fluid could have shot some rubber pieces?

 

My thoughts would be master cylinder or a leak somewhere causing the loss of pressure. I don't think the mixing of fluids could cause an issue. Other than that, perhaps some air made its way into your ABS modulator assembly. Air trapped their can be extremely difficult to get rid of.

 

You know what, shop got back to me, every one of the bleeder screws was clogged... this was my first time using a pressure bleeder, usually do the 2-person deal, and in hindsight thought the fluid was pushing out sort of slow... either there was some crud already in there or the pressure knocked some loose! Will see in the morning how much I'm getting charged for this (although it saved me a ton of time, so no complaints).