Late-model vehicles, mainly European which have FSI (Fuel Stratified Injection) type engines, where the fuel is injected straight unto the piston, bypassing the valves, have a tendency to build up hard carbon sooth on the valves, causing hesitation, sluggishness, hard to start and numerous engine light faults.
We have the equipment to clean out the carbon completely and cleanly off the valves without expensive cylinder head removal.