s13 Brake help!? thanks

[silverdemon16]

When I push down on the brake it feels spongy and I bled the brakes and took it for a spin and the brakes still don't work. I have a s13 hatch with a s14 brake booster that was already in my car...any ideas...booster bad? Thanks

[theresyourproblem]

Does it go to the floor? Can you lock them up? Does it make any noise?

[silverdemon16]

Yeah it goes to the floor and when I drove it and pressed down on it I can hear some noise coming from the calipers I think

[buentellomma]

sounds like your master brake cylinder is gone, check for leaks on the lines before replacing it because its not an easy task

[theresyourproblem]

^yup. master cylinder.

[silverdemon16]

here's another thing we did, he took off the vacuum line for the booster and blew into it and held it shut and I stepped on the pedal and it actually got harder like it's suppose to...do you think it's still the master cylinder, because I don't see any leaks? but I'll look again for leaks

[silverdemon16]

sounds like your master brake cylinder is gone, check for leaks on the lines before replacing it because its not an easy task

I think I'm going to try to bench bleed the master cylinder now, and if that still doesn't work then I'll replace it. What master cylinder can I use? only s13...or can I use s14, z32, etc...?

[modulation]

I think I'm going to try to bench bleed the master cylinder now, and if that still doesn't work then I'll replace it. What master cylinder can I use? only s13...or can I use s14, z32, etc...?

You can use the master cylinder off any car you named.
Also a Z31, but not a q45. Only the s14 or z32 will be the same size or larger, the rest are smaller I believe except for maybe the z31 which is a little bigger.