Posted on 9/28/2022
If your car's spark plugs are bad or failing, you may notice one or more of the following symptoms. Engine misfires, poor fuel economy, the engine running rough, and the 'check engine' light being on are all signs that your spark plugs may need replacing. The best way to prevent failing spark plugs is to perform regular maintenance and use high-quality spark plugs. Symptoms of Bad or Failing Spark Plugs Engine Misfires A spark plug that is failing or has gone bad can cause an engine to misfire. The symptoms of a misfiring engine are a decrease in power, acceleration, and fuel economy. You may also notice that your engine is running rougher than usual and that the check engine light is on. Poor Fuel Economy Another symptom of bad spark plugs is poor fuel economy. If your spark plugs are worn out, they will not be able to ignite the fuel efficiently. This will cause your engine to run less efficiently and use more fuel. The Engine is Running Rough If your spark plugs ... read more