Check spark plugs and ignition system
Inspect your spark plugs as described in section 7 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.
See also:
General Checks
These are the regular checks you should perform when you drive your Hyundai or
you fill the fuel tank. A list of these items will be found on page 6-4. ...
Instrument panel light control (rheostat)
The instrument panel lights can be made brighter
or dimmer by turning the instrument panel light
control knob. ...
What About Gasohol?
Gasohol (a mixture of 90% unleaded gasoline and 10% ethanol or grain alcohol)
may be used in your Hyundai. However, if your engine develops driveability problems,
the use of 100% unleaded gasoline ...