See also:

Check Spark Plugs and Ignition System
Inspect your spark plugs and replace them if necessary. Also check all ignition wiring and components to be sure they are not cracked, worn or damaged in any way. ...

Spark Plugs
Make sure to install new spark plugs of the correct heat range. ...

IMPROVED LOOK HARDLY THRILLING
Visually, the Accent looks quite similar to a Fiesta, so much so that in the rear view mirror, we often mistook it for its American competitor. Upon closer inspection, the styling cues themselves ...