Spark plugs are key components of any engine. Depending on the size and capacity of your engine, your car could have anywhere from four to eight spark plugs. The function of the spark plug is to ignite the compressed air/fuel mixture in each cylinder, isolating a small combustion explosion which then results in your engine turning over and starting.

If one or more spark plugs are bad, your engine may have trouble starting or might not start at all. When it comes to diagnosing bad spark plugs, the service experts at JK Subaru are factory-trained to inspect your plugs for damages using the latest electrical safety gear. We'll remove each spark plug from the engine, clean the inside of the cylinder, check the gap using a specialized tool, and replace the plug if it is damaged or corrupted.