Wrong master cylinder?
I need some insight from someone that works on these more in depth. I installed a master cylinder chasing a soft low pedal issue I fixed all the leaks that we've seen and still didn't fix it. I bought a ACDELCO 18M429. And put it in it's a 13/16. I didn't save the old one but the brakes have still never felt right after putting that one in. I'm wondering if I need the 15/16 one instead. I have a 91 lx sedan with an automatic