sputter
Definitions
To make a series of soft explosive sounds, such as those made by an engine or a flame.
To speak in a hasty or confused way, often due to excitement, anger, or embarrassment.
To eject particles of material in short, sharp bursts.
Examples
The old engine began to sputter and cough before finally dying in the middle of the intersection.
He tried to explain the situation, but he could only sputter in confusion as the words failed him.