brakes
 

93 bird when i push brake pedal it pushes back up n down hard n load knock when it pulsats up any heip new here thanks

Most likely your rotors need replacing. Pulsating is likely caused by Thickness Variation or warped rotors.
Just get an old fashioned brake job.

either that(rotors) or its abs activation.

abs
 

dont think have abs how can i tell

if it has abs, the abs light on the instrument cluster will do a bulb check at key on.