Is Your Direct Injection Engine Losing Power? Many modern direct-injection engines slowly lose performance without their owners even realizing it. Over time, carbon deposits build up on the intake valves, restricting airflow and affecting combustion efficiency. The result? Reduced power, poor throttle response, rough idle, increased fuel consumption, and an engine that simply doesn't feel as sharp as it once did. That's exactly what brought this Audi SQ5 into our workshop. Th

Modern performance SUVs like the Audi SQ5 are impressive straight from the factory—but once mileage climbs, hidden issues can quietly steal power, efficiency, and drivability. This SQ5 arrived at Revhigh with just under 96,000km , and while it still drove well, the data told a different story. Direct-injection engines are notorious for carbon build-up, especially on the intake valves. Over time, this restriction reduces airflow, disrupts combustion efficiency, and limits how