I've spent an inconvenient amount of time and money trying to bleed my brakes myself. I did it one time over the summer with the "standard" procedure (at this time I didn't know that these cars had a weird brake bleeding sequence) and got a perfect pedal, seemingly completely by accident. A few months ago though, one of my wheels went into a ditch, and I guess it dislodged a bubble because my brake lines because they've been persistently spongey since. I bought a harbor freight vacuum bleeder (did nothing), and then i tried buying external check valves to prevent air from getting sucked back into the bleeder screw (two cycles of the nissan sequence and the "traditional" sequence changed nothing). I now have few options left:
Buy a pressure bleeder
Do a proper two-man bleeding procedure, and then cycle the ABS by getting up to speed then slamming the brakes.
Buy an ABS capable scan tool, and cycle the ABS solenoids.
Or completely fold and bring it to a brake technician.
ChatGPT is firm set on the idea that there's air in the ABS module (I really hate AI, it's so confidently wrong in so many things), and then redneck bleeding the ABS (slamming on the brakes a few times then bleeding again) could fix my issue. I'm not 101% sure it is the ABS module but it's seeming like the biggest possibility right now. I have seen someone mention years ago on these forums that you don't actually need a scan tool when bleeding the brakes, but I haven't seen anyone else agree. What would be my best option here? Get a motive power bleeder? Have a buddy help me? Buy the scan tool and return it? Or fold and bring it to a technician.