A spark plug is a small but important part of an engine. It delivers the spark that ignites the fuel-air mixture, allowing the engine to run smoothly. When a spark plug fails, the engine may misfire, ...

2. Resistance Test Using a Multimeter: A resistance test with a multimeter can help you determine if your spark plug wires are functioning correctly by measuring their internal resistance. – Make sure ...

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: ...

For all of you who have a multimeter thrown in a drawer or toolbox but don’t know how to use it, these instructions will help in your search for missing voltage.