It is best to replace spark plugs at the manufacturer's recommended interval, even if they appear clean. Batteries in tire pressure sensors are not replaceable; the entire sensor unit must be changed.

Spark plug testers will only help you figure out issues related to spark plugs. Does that make them useless, or is there a point to having them around?

So you've pulled the spark plugs from your car, motorcycle, or nitromethane-powered phone charger, and they seem dark. Sure, spark plugs, which ignite the fuel-air mixture in engines and make them go, ...

Spark plugs can get wet in a lot of ways. That's not to say it happens all the time, especially in newer engines, but it does happen. And when the plug is soaked, it's not going to fire. That's true ...