Slow actuator movement is a symptom of what condition?

Slow actuator movement can often be attributed to a partially blocked flow control valve (FCV) port. When the FCV has some blockage, the airflow to the actuator is restricted. This lack of sufficient air pressure or volume hinders the actuator's ability to move at its normal speed, resulting in slower operation.

In contrast, over-lubrication of valves can lead to other issues, such as increased friction, but it is less likely to specifically cause slow movement in an actuator. Excessive air pressure typically wouldn’t result in slower movement, as it generally enhances performance by allowing faster operation when everything else is functioning properly. A faulty actuator motor may cause issues as well, but consistent slow movement is more directly tied to obstructions in the air path, which is why a partially blocked FCV port is the most appropriate explanation for this symptom.