Hey guys! New here and new owner to a 1999 cruiser. I bought her about 2 months ago with 115k miles and has been great so far but started to idle rough a few days ago. The CEL came on and would flash when driving so we replaced all 8 coil packs as well as sparks plugs. Once replaced, the CEL turned off and it is idling better but still not 100% as smooth as it used to be. Any suggestions?