there is a rattling noise when slowly accelerating

What is your question?

Hello, when I reach a certain speed, say 40mph, the car is fine but when I let go and step on the gas lightly, it seems as if there is a rattling noise and I have to accelerate more so it can stop. What should I do?

What makes this problem better or worse?

Accelerating faster

How long has your 2015 Ford Mustang had this problem?

Fee months