The role of the coil pack is to fire the spark plugs into action and get your engine cylinders running.
The first indication your coil pack has gone bad is normally the display of the check engine light warning on your dash. Though a faulty a coil pack will not necessarily bring your vehicle to a halt, you may experience rough engine running, misfiring and will affect your engines overall performance. Your exhaust may also emit smoke intermittently instead of a steady flow.
If your coil pack has reached the end of it’s life cycle, it can be easily replaced at low cost with basic mechanical knowledge