how do you check spark plugs Archives | Automotive Training Centre

A technician removing a spark plug from a gasoline engine during inspection

Spark Plugs Explained: Symptoms, Service Intervals, and Misfire Clues

TL;DR How often to change spark plugs depends on the vehicle, engine design, and plug type. Some plugs wear out sooner, while long-life plugs can last much longer. New technicians inspect spark plugs

21 May 2026

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Eric Louwet Auto Body Technician

I had a dead end job.
I wanted a career
I found ATC on the web
The teachers at ATC are knowledgeable, easy to work with and they always answered my questions clearly. The teachers and staff are amazing.
I learned everything I needed to start a career in the mechanic trade
The schedule they offer made it possible for me to work full time during the day and study in the evening, and the study program is up to date.
Eric Louwet, graduate, automotive technician program

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