Spark plug guide: how do they work?
Spark plugs are used by petrol engines to ignite the air/fuel mixture in the cylinders at the correct part of the combustion cycle.
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Spark plugs Tips and Tutorials Archive
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How to check and change your car’s spark plugs
Rob Keenan runs a BMW 2 Series.
Find him on Twitter @zorba_t_greek
Are your car’s spark plugs causing an engine misfire? Perhaps you're changing them as part of your car's service? Haynes has all of the information you need...
How to test a spark plug
Have you ever wondered what a spark plug's job is? How to find them, and how they are tested? Well read on and we'll give you the answers... ...