Brake pedal goes almost to the floor before brakes engage

[Jim S]

I have completed the Turner Brake upgrade and all new drum brake parts on the rear.  Today I got my original booster rebuilt back from Studebaker Itnl and a new master cylinder installed. I bleed the system 3 times.  The brakes engage, however only until the pedal is almost at the floor!  I checked the measurement of the booster to master push rod and it is correct. Any thoughts welcome.

Edited 3 hours ago by Jim S

[Zedman]

Jim, what year is your Avanti?.... Does it have a proportioning/Combination Valve?   If it does, did you bleed your brakes using the centering tool made for this purpose?  If you don't use this tool to fix the position of the internal shuttle valve, half your system will be left unbled.