Timing refers to the phasing of several events which occur while an engine is running, such as valve opening and closing, and the spark or fuel injection.
If these events do not occur at the right points in the combustion cycle, the engine will not operate efficiently – if at all.
Choose a letter from the Jargonbuster
Choose from above to see the list of jargon for that letter,
or see the full Jargonbuster list here