I am restoring my firebird, and replaced everything that has to do with my brakes(everything) with the motor out. I bled them and they seemed to work fine. Then I put the motor back in, started it up, went to back it up and had no brakes at all, pedal went to the floor. If anyone has any ideas where to start at fixing this please help. I am going to try rebleeding them, if that doesn;t work I'm lost.

 

yes i suggest bleeding them properly

 

Just a thought, are you getting vacuum to the brake booster?

 

BLEED BLEED AND MORE BLEED. you gotta get al the air out of the system, you sure yo uhave no leaks rights. break fluid on the driveway is not good. dont forget to keep adding fluid. this is best done with 2 people and right tools