How Bad Spark Plugs Affect Engine Performance


A bad spark plug can cause a number of problems for your car’s engine. Whether it’s simply misfiring or causing damage, a bad spark plug can have deleterious effects on your car.

Fortunately, there are steps you can take to ensure that your car doesn’t have a bad spark plug. First, make sure your car is in good mechanical condition. If there is any kind of loose connection, change it out right away to avoid any further damage. Also, make sure your plugs are clean and free of debris. If they’re dirty, they won’t create a strong spark that will fire up the car engine. Read on for more spark plug maintenance tips.

Can a bad spark plug affect engine performance

spark plug 1
Spark plugs can last 30,000 to 100,000 miles

A bad spark plug can greatly reduce engine performance. The spark plug is responsible for igniting the air/fuel mixture in the cylinders. If the spark plug is not working properly, the air/fuel mixture can not be ignited resulting in a loss of power, increased fuel consumption and increased emissions.

The engine may also misfire, run rough or stall. In some cases, a bad spark plug can cause the engine to overheat due to incomplete combustion. Regular maintenance and replacement of spark plugs is important for optimal engine performance.

when is the right to change your engine spark plugs

The spark plugs should be checked and replaced as part of your regular maintenance schedule, typically every 30,000 to 100,000 miles. Spark plugs should also be replaced if your vehicle is experiencing any of the symptoms of a bad spark plug, such as misfiring, poor acceleration, poor fuel economy, or difficulty starting.

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If your spark plugs are more than four years old, they should be replaced regardless of mileage. If you plan on keeping your car for the long haul, then regular spark plug replacement is a must.