I recently installed jdm ef9 rear disc brakes and goodrige steel braded lines i flushed and bleed the system severl times going in order rr, lf, lr, rf. i alsoinstalled the proportioning valve it came with. the brakes still feel a little mushy compared to my friends eg with steel lines. any answers or suggestions would be greatl appretiated. oh ya i also its a 1991 civic si and has DA front brakes.

 

I WOULD GO BACK TO THE BASICS AND CHECK UR MASTER CYLINDER FOR LEAKAGE BEHIND INTO BOOSTER. AND WAS THE VALVE NEW??

 

so i gota take the mast cyl off and look for leaks? should i just buy a integra DA one? would that push more fluid? now that i think about it the PAINT ON THE BOOSTER BELOW THE mast cyl was eaten off from brake fliud from the previous owner but never leaked on me. and when i drive it doesnt fell like its loosing any pressure or hits the floor. they actually work good just not as stiff as i expected. ps the prop valve had the old linescut and left in ther to keep it seeled, also the pads look original there nissin or some ****. THANKS!!!

 

Wait a day or two and try to bleed again. Sometimes there is still a little air in the system and it takes a while to make its way to the bleeders. Also check the master cylinder as air in it or if it's old and the seals are bypassing fluid, it will cause mushiness.