What would cause your car to spit and sputter only when you accelerate?

What would cause your car to spit and sputter only when you accelerate?
I'm sure that there are many correct answers to this question.

Sputtering usually happens when there is a lack of fuel or spark when the engine attempts combustion.

Many things can cause an engine to sputter, however "sputtering during acceleration only" is often due to a lack of or an incorrect timing of spark. I suggest you have your spark plugs or coil pack checked. I'd guess that there's a better than 50% chance of that being the problem. If that isn't it, my #2 choice would be that you need a new fuel filter because when you accelerate the engine is trying to draw extra fuel and the fuel filter is limiting the flow of gas.

You will likely only be able to know for certain by taking it to a mechanic. I hope it's only the fuel filter. They are very inexpensive compared to a whole set of spark plugs or worse, a whole coil pack.