I'm pretty sure a lot of people are having this problem. My car (CSVT) is actually at the dealership now for the 2nd time in 2 weeks for the same problem. I have done a bunch of searches and really haven�t come up with anything definitive. Many have said it is a fuel pump which is new, and does not work well with our engines. Have you had the fuel pump replaced lately??
My dealership first thought it was the PCM, but they were wrong. The car had the same problem 2 days later. If I find anything out soon, I will let you know.