A sputtering engine can feel like a jerky or shaky movement while driving. Your car will feel like it's hesitating or stalling, and you may feel a lack of power or acceleration. The engine will likely make a popping or backfiring sound, and you may notice a decrease in fuel efficiency. In most cases, the check engine light may also turn on as a sputtering engine could be a sign of a problem with the fuel, ignition, or exhaust system.