Do Atkinson Cycle Engines Have Carbon Buildup?

Do Atkinson Cycle Engines Have Carbon Buildup? Failing Sensors from Fouling. Black Smoke from Exhaust System. Rough Idles/Hard Starts. Engine Cylinder Misfires. Decreased Acceleration/Performance. How do you prevent carbon build up in GDI engines? Change oil according to the manufacturer’s recommended change intervals and using the specified oil for optimal performance of the intake valves.