Engine sputtering suddenly?

Hello,

I'm going to need a little more information to help you out.
Sputtering is a little vague, can you describe what it's doing a little better so we can identify whether your having a electrical issue or a fuel issue. Is it happening on acceleration or at idle? So all that work was done, the car was fine both before and after it was in the shop and now this sputtering just started? Maybe you just need a tune up? Is the check engine light on? When you say sputtering what exactly do you mean? Are you getting a misfire or a poor idle? Has it lost power? If you pull out a spark plug or two and take a pic of them for me to see that would help to know if your getting good ignition.
Let me know,
Tom

It sounds like the car is misfiring. To confirm lets run the codes. Please check out these guides:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Let us know what happens and please upload pictures or videos of the problem.