OK OK before I start let me say I have been bleeding brakes for years and NEVER had this problem BUT this is a complete new setup and that I have never done before also I have Wilwood calipers on the front and they have both inner and outer bleed nipples also I Have a new servo, do note the engine has not been started and therefore no vacuum in the tank.
now the problem, I have bled all the brakes and no air in system BUT I still have no pedal I assume an airlock somewhere, other points I forgot to bench bleed the master cylinder.
PLEASE see attached drawing to show how I have connected the brake line just in case I have screwed up there. ANY help will be gratefully received.
I have no doubt you are experienced @ brake bleeding - mysteries happen to the best of us, according to your diagram this is an inline brake booster? you could do a drip bleed @ the master to make sure there’s no air & also at the inline booster master, keep the inline master connected to brake lines but unbolt from booster, to check for leaks, double bleeders on - maybe bleed inner/outer a@ the same time with non return bleed tubes, what brake system on the rear?
after thought, with a proper brake hose clamp you could isolate the rear brakes & try light pressure on the pedal for any resistance.
Have you mounted the Wilwood calipers the richt way, I mean, left and right are different.
This all has to do with the bleed nipples, if do wrong there will always remain a air bubble.
Post a picture on how they are mounted!
Break it down in to sections…block the o/p of the master…is your pedal now solid…then connect up to servo and block servo o/p…is pedal solid…etc…etc…Steve
This happened to me last year - couldn’t get a pedal. It turned out that the master cylinder piston was not returning with the push rod/pedal. So after servicing the servo and the attached slave cylinder, I had to pull down the master as well to service it. I think what happens is that the master’s piston bottoms out in the debris at the end of the stroke - a place it does not usually go - and binds up. Stripped, cleaned and a new piston rubber and it was all good. FWIW.
