How to Test Spark Plug

‘The Copenhagen Test’ twists itself into knots answering a question: Who can you trust?

Most things in this world have their good points and their not-so-good points, and this is certainly true of “The Copenhagen ...

Buddy's DIY on MSN

In this video, learn to test spark plugs and ignition coils for a BMW using a specialized test kit. Discover how to identify ...

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