Help-Brake bleeding failure

Question,

I’ve been working on the brake system on my car for probably four months.

Started with a four-wheel disc brake conversion as when I bought the car there were no brakes or break lines. I ran all new lines and fitting along with a brand new dual master cylinder, and the kit supplied calipers and such.

Originally, I consistently had leaks, probably due to poor flares and not tightening the lines enough... but those all have been fixed and I have no leaks from any fittings or anything of the sorts.

I’ve been trying to bleed the brakes: bled the master cylinder and then pump the brakes 15 or so times, then starting at the rear passenger side, opening the bleeder with the pedal down, tightening it before the pedal is released.....I’ve tried this at all four calipers...

So based on previous leaks, I know fluid is at least to the banjo nut, BUT NOTHING OUT OF THE BLEEDERS...Any of them!


So before I go out and purchase new pre-bent lines just to make sure it’s not my poor skills, is there anything I’m missing?