Spark plugs may be small, but they have a huge impact on your car’s performance, fuel economy, and reliability. Choosing the right size, heat range, and material can prevent misfires, knocking, and ...

So, it's time for new spark plugs. Your hands are covered in grease, you're twisting the ratchet, and –- snap. Half the spark plug stays lodged inside your cylinder head like a nonpaying tenant who ...

Damaged or neglected spark plug threads can turn a quick tune-up into a costly engine repair. From misfires to stripped threads, prevention and proper repair techniques are key to keeping your car ...