San Jose Auto Repair

Spark plugs play a big role in how efficiently your engine runs. Each one creates the spark that ignites the air-fuel mixture inside your engine’s cylinders. When they’re in good condition, combustion is clean and efficient, resulting in improved fuel economy and smoother performance. However, when spark plugs start to wear out, fuel is burned less efficiently, resulting in wasted gas and lower miles per gallon. Signs of Worn or Failing Spark Plugs Spark plugs don’t usually fail all at once—they wear down gradually. Some of the most common symptoms of worn plugs include: Difficulty starting your vehicle Rough idling or hesitation when accelerating Misfires or reduced engine power Lower fuel efficiency than usual These symptoms may seem minor at first, but they accumulate to higher fuel costs and increased strain on your engine over time. How Spark Plugs Affect Combustion When spark plugs wear, the gap between the electro ... read more