Variable Valve Actuation encompasses systems that dynamically change how and when an engine's valves open. By adjusting the cam profile or using camless electro-hydraulic actuators, VVA optimizes airflow into the cylinders across different RPM ranges. This maximizes high-end horsepower while maintaining low-end torque and fuel efficiency.
Heard on the job
The VVA solenoids are clogged with sludge, so it's stuck in the low-lift profile and has zero power on the highway.