i have a 98 blazer and having some rear brake problems. the rear brake line busted do to rust so i replaced it from the front to the back. i got the brakes bled but the brake pedal still isnt gaining any pressure at all. it will have pressure when the motor isnt running but when started you have to put it all the way to the floor and still wont have any pressure when you pump it. if anyone knows anything i would really appreciate the help.

 

Did you have someone pump the pedal when you bled it or just gravity bled it. Probably still air in there somewhere

 

ya we did it both ways but it still has no pressure when the motor is running.

 

Starting with rear passenger side.
Make sure reservior is full, open the bleeder...not too much, put a small hose on the bleeder put the other end of the hose in a small bottle that has a little bit of brake fluid in it. with the hose down in the fluid have someone pump the brakes until the guy holding the bottle sees no more bubbles.. have the pump guy hold the pedal down while you bottle guy tightens up the bleeder. Fill the reservoir... Go do the same thing on the Drivers side.

If you still have no pedal it means you really got air in the sytem and you may have to procede to the front Brake calipers. Passenger side first.