How Do I Know If My Spark Plugs Are Bad?  If your vehicle is not running like it used to, your spark plugs could be the reason. Spark plugs play a major role in starting your engine and keeping it running smoothly. When they begin to wear out, your vehicle will often give you warning signs.  Common Signs of Bad Spark Plugs You may need a Spark Plug Replacement if you notice:  • Engine misfiring  • Rough idling  • Slow or hard starting  • Poor acceleration  • Decreased fuel economy  • Check engine light turning on Over time, spark plugs naturally wear down from heat and use. As they weaken, they cannot ignite the fuel mixture properly. This causes hesitation, loss of power, and reduced performance. Ignoring these symptoms can lead to bigger and more expensive engine problems.  Why Replacing Spark Plugs Matters Replacing spark plugs on time helps:  • Restore engine power  • Improve fuel efficiency  • Protect your ignition ...