heres the deal. i swapped all the brake stuff from a DA into my std. hatch. bleed the brakes a ton. worked fine for awhile. now the pedal goes soft sometimes, and if I pump it once, its hard again. is this a bad master cylinder? would a master cylinder from a 94+ integra bolt to the booster from a 90-93?

 

That does sound like a bad master cylinder, I had one which is why I upgraded to the DA brakes and all that was fixed. And the 94+ Master cylinder will not work with a 90-93 Booster.

 

i didn't think so. my options are: rebuilt master cylinder from napa, or get a booster and master cylinder from a 94 +, pending the booster would bolt to the firewall. i'll do the first one