A battery in a traditional car cannot directly create engine spark. It’s only rated at 12 volts, after all, so it needs a little help boosting the signal to the spark plugs. To make that happen, a car ...

Easily diagnose engine ignition issues with our Inline Spark Plug Tester. This Straight Boot Engine Ignition Tester is designed for small engines, making it the perfect Ignition Coil Tester for ...

The post How to Test a Spark Plug to See If It’s Working appeared first on Family Handyman.

It's springtime! Time to start working on your project car, learn a new wrenching skill, discover what everything is under the hood (and how it works), or just spruce up your daily driver. All month, ...

All things lead to the spark plug. You can spend all the money you want in fancy intakes, cylinder heads, or engine management, but if you're not paying attention to the most important step in the ...