In his article in The Drive, O’Hop walks us through two different ways to test a spark plug at home: a grounding test and a multimeter test. Here’s what you’ll need: ...

Attach the spark plug to a spark plug tester, then connect the tester to the ignition wire. Start the engine and observe the ...

Learning how to test glow plugs ensures your diesel engine remains reliable and efficient. Here is how to test glow plugs.