Ok, so i put GSR front brakes on my coupe (not the rear, just front) because my calipers were messed up on my stock ones, but now the pedal goes to the floor i bled the brakes real good, Could it be the Brake booster or MC or porportioning valve?

 

sounds more like the brake booster b4 the proportioning valve, but you might want to take a look at the master cylinder as well, are u losing fluid?

 

booster will never cause the pedal to drop. low pedal effort is almost always hydraulic issue. im wondering if you are using the stock MC???

 

yes im using the stock MC its the 7/8 from the 95 Ex, and i dont seem to be looseing fluid? so im confused....