power brake problem

[dusterbd13]

finished bleeding the power brake swap tonight. used booster, new master. new check valve.

when i fired up the car, the pedal sank to the floor, and has no movement in it whatsoever. shut off the car, and after a while, the pedal came back up. did it a few times. im trying to figure out whats wrong.

i havent let the car come off the choke yet, as my family is asleep and its got 3 inch pipes. (my garage is in the basement)

my theories:
1. bad booster
2. not enough manifold vacuum due to being on the choke
3. check valve working backwards?

let me know what you think. hoping to have it drivable for the last week of nice weather here.

michael

[David Pozzi]

The pushrod from pedal to the booster plugs in to a plastic "reaction valve" inside the booster. It sounds like this valve is broken which is very easy to do when the booster is not in the car. The reaction valve lets air enter the booster when the brakes are applied, this air pushes on the diaphragm.
You can probably use your booster as a core and get a rebuilt one locally.
David