Engine Tune-Ups, Spark Plugs & Ignition Service

While older naturally aspirated cars ran plugs for 100,000 miles, modern high-boost turbocharged BMW, AMG, and Porsche engines require fresh plugs every 30,000 to 45,000 miles to prevent misfires, coil burnout, and pre-ignition knock.

In direct-injection (GDI) engines, fuel is sprayed directly into the combustion chamber rather than over intake valves. Without fuel washing the valves, crankcase oil vapors bake into hard carbon on intake ports, restricting airflow by up to 30%. Crushed walnut shell media blasting cleans valves back to bare silver metal without damaging aluminum heads.

If your vehicle is over 60,000 miles or experiencing intermittent misfires under heavy acceleration, replacing coils with plugs is highly recommended. Worn spark plugs with wider electrode gaps force coils to generate higher voltage, causing internal coil insulation breakdown.

Cold-start stumbling is a hallmark symptom of intake valve carbon buildup, fouled spark plugs, or leaking direct fuel injectors bleeding pressure into cylinders overnight. A computerized live misfire counter scan pinpoints the exact cylinder.

Always. Never install pre-gapped plugs straight out of the box on high-boost European engines. We verify every plug gap with wire feeler gauges to exact factory specifications (e.g. 0.022-0.030 inches depending on engine tune).

Yes. Restoring optimal spark timing, clean air filters, clean MAF sensors, and clearing carbon restrictions typically recovers 2 to 4 miles per gallon and restores lost low-end torque.