A tune-up is one of the most important services for your vehicle, and an effective way to prevent unexpected engine trouble, and costly repairs. During an engine tune-up at Four County Import Service, in Mt. Airy, MD, our ASE certified mechanics will thoroughly look over your vehicle and may replace the spark plugs, spark plug wires, air filter, fuel filter, distributor cap and rotor in your vehicle. Our tune-up experts will also check belts and hoses, emission levels, and fuel lines. Regular tune-ups and engine diagnostics can help the performance of your vehicle and extend its life.