Hi, I have a Honda Civic 99.
help naman po, bumababa kasi yung RPM nya after mag rev
ito po yung sample video nya.

https://www.youtube.com/watch?v=l0dn...ature=youtu.be

Already did the following:
*replaced the IACV
*replaced the spark plugs
*cleaned the throttle body
*tuned up the engine
*changed the oil