VTCAPAgirl, noting that the car only has 55k, means that it was only driven only about 5-6k per year. With electric use this may be actually only 4-5k per year. Would be helpful to know how the car was used in the year prior to your purchase, [short drives at low speed] or if was on dealer lot for any amount before purchase. From what you say, it sounds as this may be a fuel related problem, [bad-old gas or fuel injectors need cleaning]. I would put in some quality fuel cleaner & drive the car as the household primary [if you aren't doing that now] for a week or so & see if that will help, won't hurt, may help. This is with the assumption there is no check engine light. Thanks for the read.