I suppose this is a car component. The ignition coil could be burned due to high current flow through the primiry wiring for too long time (large dwell angle). If this is an old style mechnical point...
The candle will continue to burn, and provided no more oxygen can enter from under the glass jar, the candle will eventually go out when all the oxygen is used up
A burning candle requires Oxygen to continue burning.
The jar over the candle restricts the supply of oxygen and therefore the candle can not continue burning and will go out.