I have a 00 civic si with a b20b vtec. My car was running fine then all of a sudden my rpms and speed went out. My rpm were fixed once I put a new dizzy. My speed came back when I plugged in right my cluster but before that I bought a new speed sensor from Honda and didn't fix it. Everything was great now my check engine light is back on and no speed or vtec!!! What can it be thanks for the help. Really want my car running immaculant!