Bad spark plug symptoms can make your car slow, shaky, and hard to start, and many drivers do not notice them early. Bad spark plug symptoms often show up when the engine struggles to burn fuel properly, causing small problems that later turn into big repair costs. When spark plugs get old or dirty, your car may lose power, shake when you stop, or take longer to start. These signs can be confusing for new drivers, but learning them early helps you keep your car healthy and avoid sudden breakdowns. Many people think spark plugs last forever, but they get…
