I’ve been dealing with the spongy brake issue and I’m at wit’s end. I rear ended (lightly) someone last week. I stood on the brake pedal with both feet and not much happened. I just bought a Motive Power Bleeder and flushed the brakes. One thing, at idle, when I hold the brake pedal down, it loses pressure and goes down. It’s like the system isn’t holding pressure. There are no leaks. There was no air in the system when I bled it but the fluid was nasty. There was no change in the braking performance after the bleed/flush. The brake pedal still feels like it’s not holding pressure. Could this be the booster?