Update #2: Still have a problem, but what a friggin mess. I ordered blockoffs for the master... made basically no difference. Brake fluid spills everywhere. Fortunately I stuffed plastic lined "diapers" around under the booster area and it caught everything so I was able to lift the mess out just as if I was lifting out an old cloth diaper. Very little fluid actually made it to paint on the truck. Phew.
But I did manage to get the new booster in and everything reinstalled without much fuss other than the mess. I hate messes.
Here's what came out of the RR caliper. Guess someone had ATE Super Blue in it at some point. I ran through the bleed procedure. "Flushed" the lines and then used ISTA to trigger the DSC/ABS pump during the second run of bleeding.
Now, my problem. My pedal no longer feels stiff all the time. It feels mostly normal, maybe slightly too much pedal travel compared to normal? Hard to say. But my braking, while feeling better than before... a bit, still feels really bad. Like unsafe for driving. Do I just need to keep bleeding fluid out of this thing because air is still in the system? So far I've ran through 2 quarts of brake fluid. Just keep going?
Let me know your thoughts, I hate doing anything involved with brake fluid for this very reason. Seems like some weird black magic to get all the air out of the system... or maybe I'm just an idiot. That's always a possibility too. But now using the pressure bleeder and ISTA I thought I would have the right recipe...
