brake bleeding problem

haveing a heck of a time bleeding my brakes, everything in the system is new. First of no leaks. I bleed them using the standard procedure, RR first then LR,RF and LF. still the pedal bleeds off when i press it. first response will ask if I brench bleed the MC, i did. could i have a bad MC? any ideas how?

If it loses pressure(falls off) without leaking,it sure sounds like a bad master cylinder.I have seen new rebuilt units be bad out of the box before.

Check your bolt to pedal make sure its tight...I had same problem turned out the bolt was loose and not allowing correct rod to mc travel.

check to make sure the MC is not leaking to the inside of the firewall when you check the bolt/rod also

Buy 2 Edelman brand brass male inverted flare plugs for several $$ at your parts house and cap the M/C and if it is good (& bled out) the pedal will be rock hard w virtually no travel

disc or drums???

ok- worked all day on this problem and here's where am at.
I plugged the MC and pedal is hard it doesnt bleed off, MC is good then I connected the rear lines and left the front plugged, pedal is hard still. looks like the fronts are the problem. to double check ;again plugged the rears on the MC and connected the fronts only and pedal bleed to the floor. confirmed there must be air getting in somewhere in the front circut. So i went and double checked all connections again and no leaks.

I was told to make sure the bleeder screws are above the brake line, would this make a difference? I am at a dead end here, any body wanna offer more suggustions?

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I was told to make sure the bleeder screws are above the brake line, would this make a difference? any body wanna offer more suggustions?

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Progress! yes the bleeder screws need to be generally toward the top, not neccessarily @12 O'clock but where the bleeder passage meets the bore that needs to be @12 O'clock as you know air will rise to the top of the bore and the factory location is generally adequate. Might have a helper push/relaease the pedal several times real fast then hold it down to agitate the fluid/air mix as you IMMEDIATELY open the bleeder to help clear the air out of there and be sure to close the bleeder before he lets the pedal up so air dont get by the bleeder threads and I like to have a block of wood under the pedal so it (the M/C cups) doesn't go past it's normal smooth travel area. Good luck and holler back.