Mazda CX-5 2.0 SkyActiv-G carbon buildup stutter
Rough idle and stumbling on acceleration developing gradually after 80,000 km on the Mazda CX-5 2.0 SkyActiv-G petrol. Direct injection means fuel never washes the intake valves. Carbon deposits accumulate on the back of the intake valves, disrupting airflow. Walnut blasting by a specialist at 80,000-100,000 km intervals is the definitive solution. Chemical induction cleaning provides temporary improvement. Mazda recommends using 98 RON fuel to slow deposit formation.
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