Making a series of short, explosive sounds, like when a car engine is not working well.
The word spluttery can make people think of frustration, annoyance, or something not working right.
Examples:
The old car made a spluttery noise.
The spluttery engine wouldn't start.
She tried to speak, but her voice was all spluttery.
The spluttery toaster kept burning the bread.
The spluttery fireworks didn't go off as planned.
The spluttery old radio crackled and hissed.