HYUNDAI ACCENT IGNITION

My Ques­tion Is, Should The Over Drive But­ton Be On All The Time Or Just Over 55 Mph And If It Is On All The Time Does This Hurt Any­thing?

First Time Do­ing Tune Up At Home And No One Can Tell Me What To Gap The Plugs. What Should It Be?

Shakes Or Wob­bles Prob­lem 2001 Hyundai Ac­cent 4 Cyl Au­to­matic 100000 Miles Hi, I Have A 2001 Hyundai. The Mileage Is A Guess. I...

Need To Know Fir­ing Or­der.